Stuck outside your home country and can’t get your bank’s one-time passcodes? You’re not alone. Many banks still send OTPs via SMS to your domestic number. If you swap your SIM for a local one or switch off roaming, those texts often stop. The good news: there are reliable, low-cost ways to keep banking secure and stress-free. This playbook explains five proven approaches—keeping your home SIM alive for SMS, using Wi‑Fi Calling (VoWiFi), moving to app-based tokens, using roaming the smart way, and when (and when not) to use virtual numbers. You’ll also get quick-set-up steps, pre-trip checklists, do’s and don’ts, and troubleshooting tips. Whether you’re in Paris, New York or Seville, you can receive OTP abroad without bill shock or lockouts. And with a travel eSIM for data, you don’t need to touch your home line at all.

Browse country and regional plans in Destinations. Popular picks: Esim United States, Esim France, Esim Italy, Esim Spain and bundles like Esim Western Europe or Esim North America.

Why OTPs break when you travel

• Banks often send OTP via domestic SMS. If your home SIM isn’t registered on a network (or roaming is off), SMS won’t arrive.
• Replacing your home SIM with a local SIM disables your number entirely.
• Even with data on a travel eSIM, SMS to your home number still need the home line to be active (via a roaming connection or Wi‑Fi Calling).
• Some banks support in‑app approvals or authenticator codes that work over data—no SMS needed.

Understanding these basics guides the setup that suits your devices, carrier and bank.

The 5 reliable ways to receive OTP abroad

1) Keep your home SIM active for SMS, use a travel eSIM for data

This is the simplest, most reliable approach for most travellers. Put your home SIM in your phone (physical SIM or eSIM), then add a local or regional travel eSIM for data. You keep your number live for incoming SMS, but you buy cheap local data on the travel eSIM.

How to set it up (iPhone with Dual SIM): 1. Install your Simology travel eSIM (see Destinations for plans like Esim Western Europe or Esim North America).
2. In Settings > Mobile Data:
- Set “Mobile Data” to the travel eSIM.
- Turn off “Data Roaming” on the home line.
- Leave the home line “On” for calls/SMS.
3. Optional: enable “Allow Mobile Data Switching” only if you want automatic failover (most people can leave this off).
4. Keep iMessage/WhatsApp/MFA apps working on data via the travel eSIM.

How to set it up (Android Dual SIM: 1. Install the travel eSIM.
2. In Network & Internet > SIMs:
- Set “Preferred SIM for mobile data” to the travel eSIM.
- Turn off “Roaming” for mobile data on the home line.
- Keep the home line enabled for calls/SMS.
3. Disable background data on the home line if your OS offers it.

Pro tips: - Incoming SMS are tiny and usually free, but confirm with your carrier. Some bill per SMS when roaming.
- If you only need OTP occasionally, you can even set the home line to “No service” and rely on Wi‑Fi Calling (see next section).
- Keep the home SIM pinned as your “default for SMS” so bank replies go to the right number.

2) Use Wi‑Fi Calling (VoWiFi) to receive SMS anywhere with Wi‑Fi

With Wi‑Fi Calling enabled on your home line, your phone registers to your home network over any Wi‑Fi connection worldwide. Many carriers route SMS over Wi‑Fi too—so you can receive OTP abroad even with cellular off.

Enable Wi‑Fi Calling (iPhone): 1. Settings > Mobile Data > your Home Line > Wi‑Fi Calling > On.
2. Keep the home line enabled.
3. Connect to any Wi‑Fi network.
4. Test by asking your bank to send an OTP while on Wi‑Fi and with Airplane Mode ON plus Wi‑Fi ON (so you know it’s truly over Wi‑Fi).

Enable Wi‑Fi Calling (Android): 1. Settings > Network & Internet > Mobile Network > your Home Line > Wi‑Fi Calling > On.
2. Connect to Wi‑Fi and test with an OTP.

Caveats: - Not all carriers support SMS over Wi‑Fi; some only support voice. Test before you travel.
- Some banks’ OTP messages are classed as “short codes”; a few carriers don’t deliver short codes over Wi‑Fi. Again, test.

3) Switch to app-based authentication (bank app approvals and authenticators)

The best long-term fix is to eliminate SMS reliance entirely. Most modern banks now support: - In‑app approvals: open your bank app and tap Approve.
- App-generated codes: a 6‑digit code that refreshes every 30 seconds, working offline once set up.
- Hardware tokens or card readers (if your bank issues one).

Steps to set up before you go: 1. Update your bank app and enable biometric login.
2. In Security/2FA settings, change the OTP method from SMS to in‑app approval or app codes.
3. Add a second factor as backup (e.g., an authenticator app).
4. Test on mobile data only (toggle Airplane Mode and enable Wi‑Fi to simulate different conditions).

Benefits: - Works over any internet connection, including your travel eSIM.
- No dependency on your phone number or roaming.
- More secure than SMS.

If you need data while travelling, pair this with a regional eSIM like Esim United States, Esim France, Esim Italy or Esim Spain.

4) Use roaming smartly for short bursts (SMS-only, no bill shock)

If your carrier doesn’t support SMS over Wi‑Fi and you can’t switch away from SMS OTP, a small roaming add‑on can be the cleanest path.

How to do it safely: 1. Buy the cheapest daily or weekly roaming pack that includes SMS.
2. On your phone, keep “Mobile Data” set to the travel eSIM.
3. Turn OFF data roaming on the home line; leave calls/SMS ON.
4. When you need an OTP, let the home line connect for a minute, receive the SMS, then toggle it off if you wish.

This keeps roaming charges predictable while your data stays on the low-cost travel eSIM.

5) Virtual numbers: only when your bank allows them (proceed with caution)

Some services let you rent a “virtual” SMS number. This can work for apps and websites, but many banks block VoIP or non-geographic numbers for security. If you intend to use a virtual number for banking OTP:

• Confirm with your bank that they accept the provider’s numbers for 2FA.
• Avoid temporary/disposable numbers—banks often reject them.
• Test thoroughly at home: change your OTP number to the virtual line, trigger logins, payees and high-risk actions to ensure you receive every type of message.
• Keep your original number as a backup factor until you are 100% confident.

For most travellers, options 1–4 are safer and more reliable.

Pre-trip checklist (15 minutes)

• Confirm your bank’s OTP methods and enable app approvals or app codes.
• Ensure your bank app works on data and over Wi‑Fi only.
• Order and install a travel eSIM from Destinations (choose regional bundles like Esim Western Europe if you’ll cross borders).
• Enable Wi‑Fi Calling on your home line and test receiving SMS over Wi‑Fi.
• Update contact details with your bank (email, backup number) and verify.
• Pack any hardware token or card reader if your bank uses one.

Do’s and don’ts

Do: - Keep your home SIM active for SMS while using a travel eSIM for data.
- Test all methods before departure.
- Use in‑app approvals or app codes where available—more secure and travel-friendly.
- Label your SIMs clearly in settings (e.g., “Home” and “Travel Data”).

Don’t: - Swap out your home SIM without a plan for OTP.
- Rely on public Wi‑Fi without Wi‑Fi Calling enabled if your bank requires SMS.
- Assume virtual numbers will work with banks.
- Leave data roaming ON for the home line—this is how bill shock happens.

Troubleshooting: if OTPs still won’t arrive

• Check network registration: does your home line show a carrier name? If not, toggle Airplane Mode or reboot.
• Verify Wi‑Fi Calling: look for “Wi‑Fi”/carrier name in the status bar; if absent, re-enable and reconnect to Wi‑Fi.
• Try a different roaming partner: in Network Selection, choose a different carrier.
• Clear SMS centre issues: send yourself a regular SMS to confirm the channel is working.
• Use the bank app: switch to in‑app approval or app code if SMS is delayed.
• Last resort: contact your bank support via in‑app chat; ask them to push an in‑app verification or temporarily switch your factor.

HowTo: Keep your home SIM alive for OTP while using a travel eSIM for data

What you need: - A device with Dual SIM (physical + eSIM or dual eSIM)
- Your home SIM active
- A Simology travel eSIM (see Destinations)

Steps: 1. Install the travel eSIM and activate it upon arrival.
2. Set the travel eSIM as the device’s “Mobile Data” line.
3. Turn off “Data Roaming” on your home line; leave calls/SMS enabled.
4. Enable Wi‑Fi Calling on your home line for extra reliability.
5. Test by requesting a bank OTP; confirm it arrives while your data is on the travel eSIM.

Outcome: - You receive OTP abroad on your home number without paying for home data roaming.
- You enjoy local-priced data for maps, calls (VoIP) and apps.

Special note for teams and frequent flyers

Setting this up for staff on the road? Standardise devices, pre-install travel eSIMs, and enforce Wi‑Fi Calling and app-based MFA via your MDM. For volume provisioning and support, visit For Business. Travel managers and partners can also explore the Partner Hub for programme options.

FAQ

• Can I receive OTP abroad without roaming?
  Yes—if your carrier supports SMS over Wi‑Fi Calling, or if your bank uses in‑app approvals/app-generated codes. Otherwise, keep your home line on for SMS while using a travel eSIM for data.
• Will an eSIM replace my number and break banking codes?
  No. A travel eSIM adds a data line. Your home SIM (physical or eSIM) still holds your number. Keep the home line active for SMS and set the travel eSIM as your data line.
• Do OTPs work over iMessage or WhatsApp?
  Not for banks. Banking OTPs are normally standard SMS or in‑app approvals. Don’t rely on iMessage/WhatsApp for bank verification unless your bank explicitly supports it.
• What if my bank only supports SMS OTP?
  Use one of: Wi‑Fi Calling (if your carrier delivers SMS over it), or a small roaming pack for SMS only, or keep your home SIM connected briefly to receive the code. Ask your bank to enable in‑app approvals before you travel if possible.
• Are virtual numbers safe for banking?
  Often not. Many banks block VoIP or disposable numbers. Only use a virtual number if your bank supports it and you’ve tested every scenario in advance.
• Will incoming SMS cost me money when roaming?
  It depends on your carrier. Some include inbound SMS free, others charge per message or per day pass. Check your plan and, if needed, buy an SMS-friendly roaming add‑on.

Next step: Pick a travel eSIM for your trip so you can keep your home SIM for OTP. Start with Destinations.

Planning to drive, walk, or cycle abroad and want reliable navigation without burning through mobile data? Here’s the traveller-proof setup: pre-download offline maps in Google Maps or Apple Maps, then use a light-touch eSIM as your live-traffic fallback. This gives you turn‑by‑turn guidance even with no signal, while still benefiting from up‑to‑date traffic, rerouting, and place details when you need them. It also plays nicely with CarPlay and Android Auto.

This playbook explains exactly what to pre‑download, how to configure Google Maps and Apple Maps for offline use, how to set up your eSIM as a smart fallback, and how to budget data on the road. We’ll flag the trade‑offs (traffic vs. zero data), cover CarPlay/Android Auto behaviour, and share tested pro tips to avoid glitches. If you’re crossing borders, we’ll also show you how to download regional maps and pick a regional eSIM so you don’t juggle multiple SIMs at the wheel.

Why combine offline maps with an eSIM fallback

• Offline maps give you guaranteed turn‑by‑turn in areas with patchy signal or in tunnels, mountains, or rural routes.
• A small amount of mobile data from an eSIM lets your app fetch live traffic, closures, speed limits, POI details, and quicker reroutes.
• You control the trade‑off: run fully offline most of the time, and let eSIM data kick in for up‑to‑date insights when it matters (city driving, rush hour, roadworks).
• Works with CarPlay/Android Auto: the maps and guidance are on the phone; the car is just the display and controls.

If you’ll drive across several countries, consider a regional plan like [Esim Western Europe] or [Esim North America] so you aren’t swapping profiles at borders. For single-country trips, pick the right local plan such as [Esim United States], [Esim France], [Esim Italy], or [Esim Spain]. Explore coverage by country via [Destinations].

What you need before you fly

• iPhone on iOS 17 or later (for Apple Maps offline) or Android/iPhone with the latest Google Maps.
• 1–3 GB free storage per large region (city sizes are much smaller).
• A travel eSIM active or ready to activate on arrival. See [Destinations], or go straight to [Esim Western Europe], [Esim North America], [Esim United States], [Esim France], [Esim Italy], or [Esim Spain].
• A charging cable for CarPlay/Android Auto (wired is more reliable and charges your phone).
• Optional: car mount for safer glanceable navigation.

Data budgeting (typical): - Pure offline navigation: near‑zero data. - Navigation with live traffic: roughly 2–10 MB per hour, depending on area and zoom level. - Searching many places, downloading new regions, or sharing live ETA: can add tens of MB. Your mileage varies by map style, density, and how often you search. The setup below keeps usage predictable.

Step‑by‑step: Set up Google Maps for google maps offline travel

1) Update Google Maps - Open your app store and update Google Maps to the latest version.

2) Download your regions - Open Google Maps. - Tap your profile picture > Offline maps > Select your own map. - Pan/zoom to cover your entire driving area (include airports, detours, border crossings). - Download. Repeat for additional areas if needed. - Optional: rename areas (e.g., “Tuscany”, “Pyrenees crossing”) for clarity.

3) Set auto‑update and storage - In Offline maps, turn on auto‑update (Wi‑Fi only). - If storage is tight, switch download location to SD card (Android) or delete old areas.

4) Pre‑plan your routes on Wi‑Fi - Search and save key stops (hotels, charging points, fuel, landmarks). - Add to a list or star favourites, so they’re available offline.

5) Test offline - Temporarily enable Airplane Mode (leave GPS/location on). - Start navigation to a saved place within your downloaded area. - Confirm turn‑by‑turn works and map tiles are visible.

6) Optimise mobile data use - Disable Street View and satellite layers (use the default map). - Use live traffic selectively: turn on when you enter busy zones, off elsewhere. - Avoid downloading new regions on mobile data; use Wi‑Fi.

Pro tips for Google Maps: - Combine multiple smaller downloads rather than one huge area to speed updates and keep storage manageable. - For multi‑day drives, download along the whole corridor plus a 50–100 km buffer for detours. - Save offline “Lists” (e.g., “Day 3 stops”) and download their areas; searching by saved places works offline. - Transit directions generally need data. Downloading regions won’t give you live timetables. - If search fails offline, navigate by exact address or coordinates saved beforehand.

Step‑by‑step: Set up Apple Maps offline + CarPlay

1) Update iOS - Go to Settings > General > Software Update and ensure iOS 17 or later.

2) Download maps - In Apple Maps, tap your profile picture > Offline Maps > Download New Map. - Search a city, region, or country; adjust the bounding box; download. - Repeat for all regions you’ll visit, including border areas.

3) Auto‑update and options - In Offline Maps, enable automatic updates (Wi‑Fi recommended). - Turn on Optimize Storage if space is limited; Apple will prune less‑used areas.

4) Save places and routes - Add hotels and key stops to Favourites; Apple Maps can navigate to these offline. - Pre‑start a sample route on Wi‑Fi to confirm guidance works.

5) Use with CarPlay - Connect your iPhone (wired preferred for charging). - CarPlay uses your iPhone’s offline maps automatically. Voice guidance works without data. - Voice dictation and some POI details may require data; plan key searches ahead.

Limitations to note: - Live traffic, incidents, and dynamic rerouting require data. - Public transport directions need data for schedules and service changes. - Rich POI details (photos, reviews) may be limited offline.

Configure your eSIM as a smart fallback

The goal: run offline most of the time, but allow small bursts of data for traffic updates, reroutes, and quick searches.

On iPhone (Dual SIM/eSIM): 1) Install and activate your travel eSIM (don’t delete your home line). 2) Settings > Mobile Service: - Set the travel eSIM as the Mobile Data line. - Turn off Data Roaming on your home line to avoid accidental charges. - Enable Low Data Mode on the travel eSIM to reduce background use. 3) In Google Maps or Apple Maps, keep default settings; the apps will use small amounts of data when needed.

On Android (may vary by device): 1) Install and activate the eSIM. 2) Settings > Network & Internet > SIMs: - Set the eSIM as the preferred SIM for mobile data. - Disable data on your home SIM while abroad. 3) Consider Data Saver mode to restrict background data.

Choosing the right plan: - Single-country: [Esim United States], [Esim France], [Esim Italy], or [Esim Spain]. - Multi‑country: [Esim Western Europe] for EU/EEA/UK‑style trips, [Esim North America] for USA/Canada/Mexico. See all options via [Destinations].

Data budgeting: how much does navigation actually use?

Typical data ranges (indicative; terrain and behaviour vary): - Pure offline with pre‑downloaded maps: near‑zero during active navigation. - With live traffic and occasional reroutes: about 2–10 MB per hour of active driving. - Frequent place searches, exploring photos/reviews, or downloading new areas: add 20–100+ MB over a day. - Live ETA sharing: roughly 0.5–2 MB per 10 minutes of sharing.

Ways to keep usage tight: - Download all regions and saved places on Wi‑Fi before departure. - Start navigation on Wi‑Fi when possible; the app caches portions of your route. - Toggle the traffic layer on only in urban areas or at expected bottlenecks. - Use text‑only search; avoid tapping into image‑heavy POI pages on mobile data. - Turn off map layers (3D buildings, satellite) and avoid Street View.

Driving with CarPlay/Android Auto on a low‑data eSIM

• Offline first: both platforms display your pre‑downloaded maps and give voice guidance without data.
• Traffic smartly on‑demand: keep traffic on when entering congested zones; turn it off for rural stretches.
• Voice control: on‑device text‑to‑speech works offline. Voice dictation/search may need data; pre‑save destinations as Favourites or Lists to avoid dictation.
• Media vs. maps: streaming music/podcasts will dwarf navigation data. Download playlists or use car radio to keep total usage low.
• Phone power: wired CarPlay/Android Auto charges your phone and keeps GPS performance stable.

Cross‑border trips: pre‑download by region

• Western Europe road trip: download each major country corridor (e.g., Paris–Lyon–Milan, Barcelona–Valencia–Costa Blanca), plus buffers around borders and ferry ports. Use [Esim Western Europe] to stay on one plan across countries.
• North America loop: download state/province blocks (e.g., California + Nevada + Arizona, or Ontario + Québec) with buffers on interstates. Use [Esim North America] or country‑specific [Esim United States].
• City breaks: download the city and surrounding commuter belt. For France, Italy, or Spain, pick [Esim France], [Esim Italy], or [Esim Spain] respectively.
• Business travel across regions? Centralise procurement and policies via [For Business], and manage partner deployments through the [Partner Hub].

Troubleshooting quick fixes

• Can’t start navigation offline:
• Ensure you’re inside a downloaded area and the route doesn’t leave it.
• Use a saved Favourite or exact address. General POI searches may need data.
• “Map expired” warnings:
• Connect to Wi‑Fi and update offline maps. Enable auto‑update to avoid future lapses.
• GPS drift or no location:
• Disable battery saver while navigating; it can throttle GPS.
• Mount the phone with a clear view of the sky; avoid placing it deep in the console.
• Storage full:
• Remove unused map areas or lower the area size.
• On Android, store offline maps on an SD card if available.
• CarPlay/Android Auto disconnects:
• Use a high‑quality cable or switch to wired from wireless.
• Keep the phone unlocked the first time you connect after updates.

FAQ

1) Do GPS and turn‑by‑turn work without mobile data? Yes. GPS is independent of mobile data. With downloaded maps, both Google Maps and Apple Maps provide turn‑by‑turn offline.

2) Will I still get live traffic and road closures offline? No. Live traffic, incidents, and dynamic rerouting need data. Use your eSIM sparingly to fetch these when entering busy areas.

3) How much space do offline maps take? A large city might be a few hundred MB; a broad region can be 1–3 GB. It depends on density and how much you include. Download only what you need, plus a sensible buffer.

4) Can I use public transport directions offline? Generally, no. Schedules, routes, and service changes require data. You can still view station locations offline but not live timetables.

5) Does offline search work for places and restaurants? Partially. Both apps support basic offline search within downloaded areas, but detailed POI info (reviews, photos, opening hours) and broad discovery typically need data.

6) Can I share my ETA without using much data? Yes. ETA sharing uses modest data (roughly 0.5–2 MB per 10 minutes). Toggle it only when needed to keep usage low.

Next step: Choose your region and plan your downloads with [Destinations].

Travelling with a VPN can be a smart move—but not for every connection or every task. The right setup keeps your banking and accounts safe, helps when streaming libraries change, and prevents snooping on public Wi‑Fi. The wrong setup can drain your battery, slow you down, or even cause bank apps to lock you out. This guide cuts through the noise with practical, traveller-first advice on when to use a VPN, when to skip it, and how to configure it properly. We’ll cover banking and streaming workflows, split tunnelling, battery impact, and regional legality notes—plus checklists you can follow before you fly.

Most importantly: mobile data from a reputable eSIM is typically safer than public Wi‑Fi. If you can move sensitive tasks (like banking) to cellular data via a local plan—think [Esim Western Europe], [Esim North America], or country options like [Esim United States], [Esim France], [Esim Italy], and [Esim Spain]—you’ll reduce the need for a VPN and avoid many connection headaches. When you do use a VPN, do it deliberately.

When you need a VPN while travelling

Use a VPN for any of the following:

• Public Wi‑Fi (hotels, cafés, airports): Encrypts your traffic to reduce snooping and rogue access point risks.
• Banking logins from a new country: A VPN with a home-country exit can reduce fraud flags and MFA loops. See best practices below.
• Streaming or sites with regional libraries: A VPN may help access your home library while abroad. Expect mixed results; platforms actively block VPNs.
• Voice and messaging apps where services are blocked: A VPN can sometimes restore access where VoIP or messaging is restricted.
• Bypassing DNS hijacking and content injection: Some networks tamper with traffic. A VPN gives you a clean path.
• Remote work requirements: Your employer may mandate a VPN for internal tools. If you’re travelling for work, coordinate with IT or see [For Business].

Pro tip: - If Wi‑Fi makes your apps glitchy, toggle a VPN on with a local server (for performance) or switch to mobile data via an eSIM.

When you don’t need a VPN

Skip the VPN in these cases:

• On mobile data via an eSIM: Cellular networks are inherently harder to snoop than open Wi‑Fi. For sensitive tasks abroad, use data from [Esim Western Europe], [Esim North America], or a country plan like [Esim United States] rather than hotel Wi‑Fi.
• Speed-sensitive tasks where encryption overhead matters: Real-time calls, gaming, or large uploads may perform better without a VPN—especially on weak Wi‑Fi.
• Services that require your true location/IP: Some airline apps, local transport tickets, and banking fraud engines may block or challenge VPN IPs.
• Apps with end-to-end encryption already in place: Messaging apps with E2EE are safe transport-wise, though a VPN can still hide metadata from local networks.
• When your VPN is causing more harm than good: If your bank locks you out or streaming refuses to load, disconnect or use split tunnelling.

VPN vs eSIM mobile data: which to use and when

• Best default: eSIM mobile data (no VPN). Use a trusted provider, avoid public Wi‑Fi for sensitive tasks, and you’ll be secure enough for everyday travel.
• Add a VPN on Wi‑Fi. Especially in airports, cafés, co‑working spaces, or rentals with unknown routers.
• Add a VPN on mobile data only when needed. For example, to reach corporate resources or to try a home streaming library.

Not sure which eSIM you’ll need? Browse country and regional plans via [Destinations], including bundles like [Esim Western Europe] and [Esim North America], or country plans such as [Esim France], [Esim Italy], [Esim Spain], and [Esim United States].

Banking abroad: the smart setup

Why banks flag logins

Banks use device fingerprints, IP geolocation, and behaviour analytics. A sudden login from a new country—or from a known VPN data centre—can trigger extra verification or temporary blocks.

Step-by-step: banking that “just works”

1. Update your banking app at home. Test logins on Wi‑Fi and mobile data.
2. Enable strong authentication. App-based 2FA or biometrics are best.
3. Prefer mobile data over Wi‑Fi when abroad. Use your eSIM for all banking sessions.
4. If you must use Wi‑Fi, enable your VPN—but choose a server in your home country.
5. Disable ad‑blockers/trackers for the banking app if it fails to load; they can interfere.
6. Keep your phone number active for OTPs if your bank relies on SMS, or switch to app-based OTP before departure.
7. Avoid repeated failed logins. If you get stuck, switch off the VPN and try again on mobile data.

Troubleshooting: - Banking app won’t load on VPN: Switch to a home-country server. If still failing, disconnect VPN and try on mobile data. - MFA loop: Clear the app cache and cookies (or reinstall). Swap networks (e.g., move from hotel Wi‑Fi+VPN to eSIM). - New device detection: Don’t factory reset or switch phones mid-trip unless necessary.

Pro tip: - Keep a secondary bank/credit card with a separate app as backup in case one provider is overzealous with fraud rules.

Streaming on the road: realistic expectations

What can work: - Catch-up TV or home library access via a VPN exit in your home country. - Downloaded content before travel—most reliable, no VPN needed. - Regional free-to-air apps that don’t enforce strict geo-checks.

What often won’t: - Big platforms with aggressive VPN detection. Even “working” servers can stop at any time. - Casting from a VPN’d phone to a smart TV on hotel Wi‑Fi. The TV and phone must be on the same network; VPN can break discovery.

Battery and data impact: - VPN + streaming = more CPU and up to 5–15% extra data overhead. Use efficient protocols (WireGuard) and drop video resolution if on metered data. - On weak Wi‑Fi, adding a VPN can amplify buffering. Try a nearby server, or use eSIM data.

Split tunnelling for streaming: - Want only your streaming app on the VPN and the rest local for speed and maps? Use split tunnelling (details below). If unavailable on your device, consider a second browser or a dedicated streaming device.

Pro tip: - Download episodes over a fast network before a long train or flight. It sidesteps geo-blocks and saves battery.

Split tunnelling: how and when to use it

What it is: - Split tunnelling lets you choose which apps or sites use the VPN and which go direct.

When to use: - Banking: Route your bank app via a home-country VPN while leaving maps and ride‑hailing off VPN for better location accuracy. - Streaming: Put the streaming app through the VPN; keep everything else local for speed. - Work: Send corporate tools via the company VPN, keep personal browsing normal.

How to set it up (general): - Android: Many VPN apps offer “Split tunnelling” or “Per‑app VPN.” Choose apps to include or exclude from the tunnel. - Windows/macOS: Look for “Split tunnelling,” “App exclusions,” or “Bypass VPN for selected apps” in your VPN client. Some allow domain-based rules. - iOS/iPadOS: Per‑app split tunnelling is limited. Some VPNs provide app exclusions; if yours doesn’t, use workarounds like a dedicated browser for VPN use, or keep critical apps on mobile data while other tasks run on Wi‑Fi+VPN.

Pro tips: - Prefer “include list” (only chosen apps use VPN) for tighter control. - Test each app after changes—some ignore system proxies and behave differently.

Battery, speed and data: making a VPN travel‑friendly

• Protocol matters: WireGuard (or modern variants) is efficient and fast; IKEv2 is stable on mobile; OpenVPN can be heavier on battery.
• Server choice: Nearby servers reduce latency and drain. Use a home-country server only when you truly need that IP.
• Auto‑connect logic: Configure “auto‑connect on insecure Wi‑Fi” rather than “always on” to save battery.
• Kill switch: Enable it on laptops; on phones, use it when you must ensure no leaks (e.g., on hostile networks). Remember it blocks traffic if the VPN drops.
• Background apps: Limit background sync and cloud photo uploads on metered/VPN connections.
• Tethering: VPN on the phone plus hotspot adds overhead. If possible, run the VPN on the tethered device instead.

Legal and policy notes by region

Laws and enforcement vary. High‑level guidance for travellers:

• EU/UK/US/Canada: VPNs are generally lawful for personal use. Platforms may still block VPN IPs; terms of service apply.
• Turkey/Egypt: VPNs are sometimes throttled or specific services blocked. Have multiple protocols available (WireGuard and IKEv2/OpenVPN).
• India: VPN use is legal; some services changed logging policies. Stick to reputable providers.
• UAE/Oman: Authorities penalise misuse of VPNs to commit offences. Access to unlicensed VoIP may be limited. Expect some blocks.
• Russia: Many VPNs are restricted or blocked; connections may be unreliable.
• China: Most foreign VPN apps are blocked. If you need one, set it up before arrival and expect instability. Corporate solutions fare better.
• Iran: Extensive restrictions; connections can be risky and unreliable.

Practical tips: - Install and test your VPN before you go. - Keep multiple protocols and server options. - Be prepared to fall back to mobile data via eSIM where Wi‑Fi is filtered.

Note: Rules change. Check local regulations and service terms in your destination. For plan coverage, see [Destinations].

Quick setup checklist

Before you travel: - Choose a reputable VPN with WireGuard and IKEv2 support. - Install on all devices and test banking logins at home. - Enable app‑based 2FA for financial accounts. - Configure auto‑connect on insecure Wi‑Fi and a kill switch where needed. - Set up split tunnelling for banking/streaming apps if available. - Download offline maps and streaming content in advance. - Add a travel eSIM for safer mobile data: check regional bundles like [Esim Western Europe] and [Esim North America], or country plans such as [Esim France], [Esim Italy], [Esim Spain], and [Esim United States].

On the road: - Prefer eSIM mobile data for sensitive tasks; avoid public Wi‑Fi when possible. - Use VPN on public Wi‑Fi; pick the nearest server unless you need a home IP. - If something breaks, toggle VPN off/on, switch servers, or move to mobile data.

For teams and business travellers

• Coordinate with IT: Use approved clients/protocols and per‑app VPN profiles.
• Separate profiles: Keep work apps in a managed profile (Android) or use MDM on iOS/macOS to enforce per‑app VPN.
• Performance planning: Offer regional gateways for roaming staff to reduce latency.
• Policy: Document when VPN is mandatory vs optional to preserve battery on the move.

If you manage roaming teams or resell travel connectivity, explore Simology’s solutions [For Business] and our [Partner Hub].

FAQ

• Do I need a VPN for hotel Wi‑Fi?
• It’s strongly recommended. Hotel Wi‑Fi is shared and often poorly segmented. A VPN encrypts your traffic and reduces exposure to snooping or rogue hotspots.
• Will a VPN break my banking app?
• It can. Banks often block data centre IPs. Try your bank on mobile data first. If using Wi‑Fi, connect your VPN to a home‑country server. If it still fails, disconnect the VPN and use eSIM data.
• Is it legal to use a VPN abroad?
• In many countries, yes. Some restrict or block VPNs, and misuse can carry penalties. Check local rules in your destination and follow platform terms. Be prepared with eSIM data as a fallback.
• Which VPN protocol is best for travel?
• Start with WireGuard for speed and battery efficiency. If blocked or unstable, switch to IKEv2 (good on mobile) or OpenVPN UDP/TCP as a last resort.
• Do I need a VPN if I use an eSIM?
• Often no, especially for banking and routine browsing on mobile data. Still use a VPN on public Wi‑Fi or when you specifically need a home IP or company access.
• Will a VPN reduce my battery life?
• Modestly. Expect extra drain, especially on weak networks. Use efficient protocols, nearby servers, and auto‑connect only on insecure Wi‑Fi to minimise impact.

Next step: Pick a local or regional eSIM to keep sensitive tasks on mobile data and reduce VPN headaches. Start with [Destinations].

Travelling with a single data plan and multiple devices is the norm. Your phone’s eSIM can power your laptop, tablet and a colleague’s phone—if you set it up right. This playbook explains how to use personal hotspot safely and efficiently on the road, with crisp steps, practical safeguards and performance tactics. We’ll cover carrier tethering rules (and what triggers flags), the APN “tether”/DUN key on Android, WPA3 security, device limits, throttle avoidance, and when to favour USB over Wi‑Fi. You’ll also find checklists for iOS and Android, battery and heat tips, and region‑specific notes for the US and Europe. Before you depart, choose a plan that explicitly allows tethering; during your trip, apply a few simple configurations to protect your data and stretch your gigabytes. Whether you’re off to New York, Nice or Naples, this guide helps you share your eSIM connection with confidence.

Before you start: choose the right travel eSIM

Tethering behaviour varies by carrier and plan. Some plans include hotspot use with fair‑use limits; others restrict or block it, or throttle tethered traffic.

• Check plan details for “tethering” or “personal hotspot” support on your destination page: see Destinations.
• For regional options, explore Esim United States, Esim France, Esim Italy, Esim Spain, Esim Western Europe and Esim North America.
• Confirm fair‑use thresholds, speed tiers and whether hotspot is included. If tethering is essential, pick a plan that says so explicitly.

Pro tip: If work depends on hotspot reliability, consider a plan with a clear hotspot allowance and published speed tiers rather than “unlimited” with vague management.

Tethering flags explained (and how to stay compliant)

Carriers can identify tethering in several ways:

• APN type “DUN” (tethering) on Android. Some networks require it to enable hotspot; others block it.
• Provisioning flags on your line that enable/disable hotspot.
• Traffic patterns and device fingerprints (e.g., DHCP options from laptops; TTL differences).

Best practice:

• Don’t attempt to circumvent hotspot restrictions. Instead, select a plan that includes it and use it within fair‑use.
• If hotspot won’t enable, your plan likely doesn’t support it or the APN is misconfigured (see troubleshooting below).

How to set up a secure personal hotspot

iPhone and iPad (iOS/iPadOS)

1) Go to Settings > Mobile Service (or Mobile Data) and set your eSIM as the Mobile Data line.
2) Tap Personal Hotspot. Toggle “Allow Others to Join” on.
3) Set a strong Wi‑Fi password (12+ characters; avoid dictionary words).
4) On the laptop/tablet, connect to the iPhone’s network name, enter the password and verify internet access.
5) Optionally enable “Maximise Compatibility” only if devices can’t see the hotspot; it may force 2.4 GHz and reduce speeds.

Notes: - iOS uses WPA2 with a strong password. There’s no WPA3 toggle today. - You can share via USB (fast, stable, power to the phone) or Bluetooth (low power, slower).

Android (steps vary by device)

1) Settings > Network & Internet > Hotspot & tethering > Wi‑Fi hotspot.
2) Network name (SSID): use something non‑identifiable (e.g., “Traveller‑5G”).
3) Security: choose WPA3‑SAE if available (Android 12+); else WPA2‑PSK (AES).
4) Password: 12+ characters, mixed case, numbers and symbols.
5) AP band: Prefer 5 GHz for speed (fallback to 2.4 GHz for older devices).
6) Set “Turn off hotspot automatically” when idle to save battery.
7) Set “Max connections” to 1–3 devices to protect performance and reduce flags.
8) Enable hotspot, then connect from your laptop/tablet.

APN/DUN note: - On some networks you must use an APN with APN type including “dun” (tether). Only add or change APN settings if your provider documents them. If your eSIM auto‑configures APN, leave it as is.

Performance and throttle avoidance on the road

Tethered traffic is often managed differently, even when allowed. These steps help you get more speed per megabyte and avoid fair‑use clamps:

• Prefer USB tethering when possible. It’s typically the lowest‑latency, most stable option and keeps your phone charged.
• Use 5 GHz hotspot for modern laptops/tablets; switch to 2.4 GHz only if range or compatibility demands it.
• Limit connected devices. Every extra device increases background traffic and contention.
• Enable Data Saver on both phone and laptop.
• iOS: Settings > Mobile Data > Low Data Mode on the eSIM line.
• Android: Settings > Network & Internet > Data Saver.
• Windows: mark the Wi‑Fi as Metered (Settings > Network & Internet > Wi‑Fi > your network > Metered).
• macOS: disable iCloud Drive/Photos sync; pause OneDrive/Dropbox; set App Store auto‑updates off.
• Cap streaming quality to 480p/720p. Download content over hotel Wi‑Fi before travelling.
• Pause OS updates and cloud backup/sync during hotspot sessions.
• Turn off background refresh on apps prone to auto‑sync (Teams/Slack file sync, photo backup).
• Use a modern browser with video codec efficiency (e.g., AV1/VP9 where supported) to reduce bitrate.
• If you suspect content‑based throttling, a reputable VPN can normalise traffic; however, this may be restricted by some providers—check your plan terms.

Security essentials: keep your hotspot private

• Use WPA3 where available; otherwise WPA2‑AES with a long, random password.
• Avoid personal SSIDs (don’t broadcast your name or company).
• Disable WPS (if your device exposes it).
• Keep your phone OS up to date.
• Turn off the hotspot when not in use.
• On laptops, disable auto‑connect to your phone’s SSID in public spaces.
• Use device‑specific passwords for sensitive work accounts; avoid logging into critical systems on an unknown, shared laptop tethered to your phone.

Device limits and smart connecting

• Android lets you set a maximum number of connections; keep it to 1–3 for best throughput.
• iOS doesn’t expose a device limit. Share the password only with intended devices and remove unknown devices promptly (change the password if necessary).

Connecting tips: - Windows: Mark the connection as Metered to prevent heavy updates and sync.
- macOS: Pause Spotlight indexing on large external drives and disable iCloud Photos temporarily.
- iPad and Android tablets: Switch off auto‑backup and limit app updates to Wi‑Fi at accommodation.

Battery, heat and power management

Hotspotting is power‑hungry and generates heat, which can cause throttling.

• Keep the phone on charge (USB‑C PD if available) while tethering, especially for video calls.
• Ventilation matters: avoid direct sun, dashboards and pockets; place the phone on a cool surface.
• Prefer USB tethering for long sessions—it charges while connected and is more efficient than Wi‑Fi.
• Lower screen brightness or lock the screen during hotspot use.
• Disable 5G if the local signal repeatedly drops; a stable 4G connection can outperform flapping 5G and reduce heat.
• Turn off the hotspot when you’re done.

Troubleshooting checklist

Hotspot toggle greyed out or won’t enable: - Ensure your eSIM is the active Mobile Data line. - Restart the phone; toggle Airplane Mode for 10 seconds. - Update carrier settings/OS. - Check plan details—some plans disallow hotspot. - Android: verify APN settings. If your provider specifies APN type including “dun”, add it. Otherwise, don’t change defaults.

Devices connect but no internet: - Confirm mobile data works on the phone itself (browse a site). - Toggle between 5 GHz and 2.4 GHz bands. - Forget and re‑join the network on the laptop; disable VPN temporarily to test. - Windows: run Network Troubleshooter; ensure MAC randomisation is on (can improve association in congested areas). - Check if you’ve hit a fair‑use cap or data limit; top up or pause heavy tasks.

Slow speeds: - Move to a window, higher floor, or closer to a cell tower; avoid basements. - Limit to one connected device. - Switch to USB tethering. - Force LTE/4G if 5G is unstable. - Try a different time of day in congested tourist areas.

Repeated tethering blocks: - Likely plan restriction. Choose a plan with hotspot included via Destinations or region‑specific pages like Esim Western Europe and Esim North America.

Regional notes for travellers

• United States: Urban 5G can be fast but variable indoors. Consider plans optimised for hotspot via Esim United States. Many carriers have strict video and tethering management—watch fair‑use.
• France, Italy, Spain: Dense 4G coverage with reliable speeds; 5 GHz hotspot generally permissible. See Esim France, Esim Italy and Esim Spain.
• Western Europe multi‑country: If crossing borders, a regional plan reduces SIM swaps and APN quirks. Explore Esim Western Europe.
• North America multi‑country: For US/Canada/Mexico trips, check Esim North America for cross‑border allowances.

Team and business travel

If you regularly hotspot for colleagues or run events: - Standardise device settings (SSID format, passwords, encryption). - Use dedicated power banks and short USB‑C cables for USB tethering to laptops. - Consider pooling data across multiple eSIMs and rotating devices to avoid per‑line caps. - For fleet management, provisioning and centralised billing, see For Business. - Partners and resellers can access bulk tools via the Partner Hub.

Quick how‑to: your on‑the‑go checklist

• Choose a plan that includes hotspot (check Destinations).
• Set strong security: WPA3 if available; otherwise WPA2‑AES with a 12+ char password.
• Limit devices to 1–3; prefer USB tethering for work calls.
• Mark laptop connection as Metered; pause updates and cloud sync.
• Use 5 GHz; switch to 2.4 GHz only if needed.
• Keep the phone cool and powered; turn hotspot off when finished.

FAQs

1) Do all travel eSIM plans support personal hotspot?
No. Some include hotspot with fair‑use limits; others block or throttle tethered traffic. Check your destination plan details via Destinations or regional pages such as Esim United States and Esim Western Europe.

2) What is the APN “tether”/DUN key on Android?
It’s an APN type value (often “dun”) used for tethering. Some networks require it to enable hotspot; others block it. Only set it if your provider documents it. If your eSIM auto‑configures APN, don’t change it.

3) Is WPA3 worth enabling?
Yes—if your phone and connecting device support WPA3‑SAE (Android 12+). It hardens against password‑guessing. If not available, use WPA2‑AES with a strong, unique password. iOS hotspots currently use WPA2 with a strong password.

4) How many devices can I connect at once?
Technically, often up to 5–10. Practically, limit to 1–3 to protect speed and stability and to avoid looking like a mini‑router.

5) How can I tell if I’m being throttled?
Clues include consistent speed caps after a usage threshold, video streams locked to low resolutions, or hotspot speeds much lower than on‑device. Check plan fair‑use notes and run speed tests. If allowed, switching to USB tethering, changing band (5 GHz/2.4 GHz) or trying at a different time/location can help.

6) Will a VPN stop throttling?
A VPN can mask traffic types and sometimes avoid content‑based management, but it won’t bypass plan‑level caps and may be restricted by your provider. Use only if your plan permits.

Next step: Planning a route with reliable hotspot support? Start with your country or region on Destinations to pick a plan that includes tethering, or choose a regional option like Esim Western Europe for multi‑country trips.

Staying productive on the road increasingly means hopping onto Zoom or Microsoft Teams from hotel rooms, trains or cafés. But “zoom abroad” doesn’t have to mean choppy audio and frozen faces. With a few smart set-up steps, realistic bandwidth/latency targets, and the right app settings, you can keep video calls sharp and reliable almost anywhere.

This guide gives you a traveller-first playbook: how to choose between Wi‑Fi and LTE/5G, what throughput and latency you actually need, which Zoom/Teams toggles to change, how much data you’ll burn at each resolution, and the quick-fix order when things go wrong. We also cover hotspot QoS pitfalls and battery optimisation exceptions that silently kill call quality. If you’re crossing borders, regional eSIMs like Esim Western Europe or Esim North America can give you lower latency and better prioritisation than crowded hotel networks. Let’s get you set up for crystal‑clear calls, first time.

Know your network targets (and how to check them)

Aim for these minimums for a solid call:

• Bandwidth (per person):
• Audio only: 100–200 kbps up/down
• SD video (360p): 600–800 kbps up/down
• HD video (720p): 1.2–1.5 Mbps up/down
• Full HD (1080p): 3–4 Mbps up/down
• Latency (round‑trip): under 150 ms ideal; 150–250 ms acceptable; beyond 300 ms feels laggy
• Jitter: under 30 ms (lower is better)
• Packet loss: under 2% (spikes above 5% cause dropouts)

How to test quickly: 1. Run a speed test (Speedtest or Fast). Note both upload and download. 2. Check latency/jitter; many tests show these under “Latency” and “Loaded latency.” 3. In Zoom: Settings > Statistics to see live latency/jitter/packet loss during a call. 4. In Teams: During a call, More (…) > Call health for real-time metrics.

Pro tips: - If upload is much lower than download, expect issues sharing video. Prioritise the network with higher upload. - High “loaded latency” (latency under load) is a red flag for congested Wi‑Fi.

Wi‑Fi vs LTE/5G: pick the right pipe

Wi‑Fi can be great, but hotel and conference Wi‑Fi is often congested and shaped. Mobile data via a local eSIM can deliver lower latency and steadier uplink.

Use Wi‑Fi when: - You can get 5 GHz Wi‑Fi (or Wi‑Fi 6), strong signal, and consistent 20+ Mbps up/down with low latency/jitter. - You have Ethernet (best case) via a travel router or directly to your laptop.

Use LTE/5G when: - Hotel Wi‑Fi is captive-portal heavy or slows at peak times. - Your speed test shows better upload/latency on mobile data. - You need mobility (rides, stations, cafés).

eSIM options for better call quality: - For the US, pick Esim United States. - Across Canada, USA and Mexico, use Esim North America. - In Europe, single-country packs like Esim France, Esim Italy, or Esim Spain and regional Esim Western Europe keep latency low across borders. - Browse coverage options by country on Destinations.

Hotspot QoS pitfalls (and fixes): - Some carriers de‑prioritise tethered traffic. If your laptop-on-hotspot stutters, try joining the call directly from the phone on the same network; it can be prioritised differently. - Use a 5 GHz hotspot: on iPhone, leave “Maximise Compatibility” OFF to use 5 GHz; on Android, set hotspot band to 5 GHz. - Prefer USB tethering (lower jitter) over Wi‑Fi tethering when possible.

Zoom and Teams settings that actually matter

Zoom: desktop and mobile

Set-up before the trip: - Desktop > Settings > Video: - Disable “Enable HD” to cap to 360p/SD when bandwidth is uncertain. - Turn off “Touch up my appearance” and set “Adjust for low light” to Manual/Off unless needed (both increase CPU). - Desktop > Settings > Audio: - Keep “Suppress background noise” on Auto (High uses more CPU and can muffle speech). - Do not enable “Original sound for musicians” unless you need full‑band audio. - Desktop > Settings > Statistics: keep this window handy to watch latency/jitter. - In meeting: - Use the arrow next to the camera icon > “Stop Incoming Video” if you need to save bandwidth. - Share a single app window, not your entire screen; only tick “Optimise for video clip” if actually playing video.

On mobile (iOS/Android): - In call, disable your video first when bandwidth dips; then try “Stop Incoming Video.” - Avoid virtual backgrounds on older phones; they raise CPU and can worsen stability. - Use a headset; it allows lower echo cancellation load and clearer audio at lower bitrates.

Microsoft Teams: desktop and mobile

Set-up before you go: - Desktop > Settings > Devices: - Noise suppression: Auto or Low. Avoid High unless you’re in a very noisy place. - Desktop > Settings > General: - Leave GPU hardware acceleration enabled on modern devices; only disable if you see rendering glitches. - In meeting: - More (…) > Turn off incoming video to reduce bandwidth. - Background effects: choose None or Blur (lightest). Avoid heavy video filters. - Share specific window or PowerPoint Live instead of entire desktop for lower bandwidth and better readability.

On mobile: - Settings > Data/Storage (path may vary) > Reduce data usage: enable on cellular. - During a call, switch to audio only if the connection degrades. - Use built‑in noise suppression sparingly; a simple wired headset often outperforms software processing.

Pro tips that apply to both: - Keep the laptop or phone plugged in during long calls; power saving modes throttle CPUs and radios. - Close cloud backup, torrents, automatic updates and other background traffic. - If corporate policy allows, avoid VPN for the call. If you must use a VPN, choose the nearest gateway to your current country.

Data usage: how much your call will consume

Approximate per-hour usage (per participant; actuals vary with motion and content):

• Audio only: 30–60 MB/h
• Screen share only (static slides/documents): 100–200 MB/h
• SD video (360p): 300–500 MB/h
• HD video (720p): 0.8–1.8 GB/h
• Full HD (1080p): 2–3.6 GB/h
• Background blur/effects: +10–20% CPU and minor bandwidth overhead
• High-motion video/screen share (e.g., video playback): can double typical rates

Ways to cap usage without tanking quality: - Turn off HD in Zoom; keep Teams on default (it adapts). - Disable incoming video when you don’t need to see everyone. - Share a window, not your full desktop; pause screen share when idle. - Avoid moving around on camera; static framing compresses better.

If calls still break up: fixes in order

1. Mute your video; if still bad, “Turn off incoming video.”
2. Switch networks (Wi‑Fi to LTE/5G or vice versa). Re-test upload and latency.
3. Move: closer to a window for mobile; closer to the access point for Wi‑Fi.
4. Hotspot tune-up: switch hotspot to 5 GHz; try USB tether; try calling directly from the phone.
5. Restart the app; on desktop, also disable/re‑enable hardware acceleration (can resolve GPU glitches).
6. Kill bandwidth hogs: cloud backup, streaming tabs, OS updates.
7. If on VPN, disconnect if permitted; otherwise choose a nearer VPN region.
8. As a fallback, go audio-only or dial in by phone and stay on screen share from another device.

Battery optimisation exceptions (don’t let the OS throttle your call)

iPhone/iPad: - Settings > Battery: turn OFF Low Power Mode during calls. - Settings > Wi‑Fi > [i] on your network: ensure Low Data Mode is OFF for the network you’re using. - Personal Hotspot: leave “Maximise Compatibility” OFF for 5 GHz performance. - Keep the device on power; iOS reduces background tasks when battery is low.

Android: - Settings > Apps > Zoom/Teams > Battery: set to Unrestricted (or “Don’t optimise”). - Settings > Network & internet > Data Saver: ON for travel, but go to Unrestricted data access and allow Zoom/Teams to bypass it. - Hotspot: set AP band to 5 GHz; prefer USB tether when possible. - Keep the device charging; many Android OEMs throttle CPU/radios in power saver modes.

Advanced: codecs, QoS and screen-share clarity

• Codecs: Zoom and Teams both use scalable video coding (H.264 SVC) to adapt to changing bandwidth; Teams also enables newer codecs like AV1 on some devices for screen sharing. You generally can’t force a codec, but you can help the app by providing stable upload and keeping motion/filters to a minimum.
• Hardware acceleration: Leave it on for modern GPUs; it reduces CPU load and helps maintain frame rate at lower power.
• QoS/prioritisation: Mobile networks may prioritise handset traffic over tethered laptops. If your hotspot underperforms, join the meeting directly on the phone. Some enterprise Wi‑Fi marks Zoom/Teams packets for QoS; consumer Wi‑Fi usually does not, so avoid competing traffic on the same network during calls.
• Screen share sharpness: Share at native app resolution; avoid scaling a 4K desktop if attendees view on 1080p. For slides, use PowerPoint/Keynote share modes where available; text renders clearer at lower bitrates.

Planning ahead for multi‑country trips

• Use a regional plan to avoid SIM swaps and roaming surprises: Esim Western Europe or Esim North America keep latency predictable across borders.
• For single-country stays, choose local plans like Esim France, Esim Italy or Esim Spain for the best local peering.
• Check carrier options and coverage per country on Destinations.
• Travelling teams can standardise with pooled plans and a simple policy; see For Business. Travel managers and resellers can get resources via the Partner Hub.

Quick pre‑call checklist

• Test your upload speed (>1.5 Mbps for HD, >0.8 Mbps for SD) and latency (<150 ms).
• Pick network: strong 5 GHz Wi‑Fi or LTE/5G with good signal (near a window).
• Plug in power; disable Low Power/Data Saver or whitelist Zoom/Teams.
• Zoom: disable HD; plan to stop incoming video if needed.
• Teams: set Noise suppression to Auto/Low; be ready to turn off incoming video.
• Headset connected; background effects off; windowed screen share ready.
• Close bandwidth-heavy apps and pause updates/backups.

FAQ

Q: What’s the minimum connection for a reliable Zoom/Teams call?
A: For audio-only, 200 kbps up/down is fine. For SD video, target 600–800 kbps up/down. For 720p, aim for 1.2–1.5 Mbps up/down. Keep latency under 150 ms and jitter under 30 ms.

Q: Is hotel Wi‑Fi always worse than mobile data?
A: Not always, but hotel Wi‑Fi is often congested and high-latency. A local eSIM on LTE/5G frequently gives steadier upload and lower jitter. Test both and pick the better performer.

Q: How can I cut data use without ruining quality?
A: Turn off HD in Zoom, disable incoming video when you don’t need it, avoid background effects, and share a single app window. Expect SD video to use ~300–500 MB/hour; audio-only ~30–60 MB/hour.

Q: My laptop on hotspot is jittery, but my phone is fine. Why?
A: Some carriers de‑prioritise tethered traffic (hotspot QoS). Join the meeting directly on your phone, try USB tethering, and ensure your hotspot uses 5 GHz.

Q: Should I change codecs in Zoom/Teams?
A: No manual codec setting is needed. Both apps adapt using scalable video codecs. Focus on stable upload, low latency, and reducing motion/filters.

Q: Do virtual backgrounds affect call quality?
A: Yes. They increase CPU/GPU load and can add artefacts at low bitrates. Prefer “Blur” or no background on older devices or weak networks.

Next step: Check local and regional eSIM options for your itinerary on Destinations and set yourself up for glitch‑free calls abroad.

Travelling with a local data eSIM is the cheapest way to stay online. The worry: losing your WhatsApp or iMessage identity, missing OTPs, or triggering costly SMS activations. The good news is you can keep your home phone number on WhatsApp and iMessage while using a travel eSIM purely for data. The trick is line assignment: leave your home line for calls/SMS, set the eSIM as your data line, and avoid unnecessary reactivation prompts.

This guide shows you exactly how to do it on iPhone and Android, with step-by-step settings, what to tap when apps say “SIM changed”, and how to prepare backup codes so you’re never locked out. You’ll also find dual‑SIM examples for common trips and a quick troubleshooting section. If you’re heading to the US, Europe or beyond, pick an eSIM from Destinations and follow this playbook to keep your number, cut roaming costs, and stay reachable.

The simple rule: keep your number, switch your data

• Keep your home SIM/eSIM active for calls and SMS (don’t remove it unless you’re certain you won’t need OTPs or calls).
• Add a travel eSIM and assign it as the “Mobile Data”/“Preferred data” line.
• Turn off data roaming on your home line to prevent surprise charges.
• WhatsApp and iMessage will continue to use your home number over the travel eSIM’s internet connection.

Why this works: - WhatsApp is tied to the number you registered with, not the SIM providing data. As long as the app stays logged in and your device has internet, your WhatsApp identity stays the same. - iMessage and FaceTime can send/receive via your phone number and/or Apple ID email. Once activated on your number, iMessage continues to work over any internet connection.

Pre‑trip checklist (10 minutes now, hours saved later)

• Confirm your phone is unlocked and supports eSIM/dual‑SIM.
• Install critical updates for iOS/Android, WhatsApp, and Messages before you go.
• Activate iMessage/FaceTime on your home number while still at home. Do not toggle iMessage off/on while abroad (it can trigger a paid international SMS).
• WhatsApp:
• Confirm you’re registered on your home number.
• Enable two‑step verification and set your 6‑digit PIN with a recovery email.
• Trigger a fresh chat backup (iCloud on iPhone, Google Drive on Android).
• Two‑factor authentication:
• Add an extra trusted number to your Apple ID, and note how to “Get Verification Code” from Settings offline.
• For Android/Google services, generate and print/save your Google backup codes offline.
• Add recovery methods for banks and key apps that send OTPs.
• Decide your eSIM plan: single‑country or regional.
• US trip: see Esim United States.
• Western Europe: see Esim Western Europe or country packs like Esim France, Esim Italy, Esim Spain.
• Multi‑country across US/Canada/Mexico: Esim North America.
• Save your eSIM QR/activation details offline (PDF/screenshot in a secure note).
• Label your lines clearly in your phone (Home vs Travel) to avoid slip‑ups.

Pro tip: Keep mobile data off on your home line. SMS usually works without data; you’ll still receive OTPs if your home number has roaming enabled for SMS. Check costs with your operator.

Set up on iPhone (dual‑SIM/eSIM)

1) Install and label your eSIM

1. Settings > Mobile Service (or Cellular) > Add eSIM.
2. Scan your eSIM QR or use the provider app.
3. When asked to label, name them clearly: - Primary or Home = your home number - Travel = your eSIM data plan

2) Assign lines for data, calls and SMS

1. Settings > Mobile Service: - Default Voice Line: Primary/Home (so your calls show your home number). - iMessage & FaceTime Line: Choose Primary/Home.
2. Mobile Data: - Set Mobile Data = Travel (eSIM). - Turn off Allow Mobile Data Switching (keeps data strictly on the eSIM).
3. For the Primary/Home line: - Turn off Data Roaming. - Leave the line enabled so SMS and calls can reach you.

Pro tip: For contacts who must always use your home number, set their per‑contact “Preferred Line” to Primary in the Contacts app.

3) iMessage and FaceTime settings that stick

1. Settings > Messages: - iMessage: ON (already activated on your home number before travel). - Send & Receive: Tick your phone number and Apple ID email. Set “Start New Conversations From” to your phone number if you want continuity, or your Apple ID email if your number can’t activate while abroad.
2. Settings > FaceTime: - Tick your phone number and Apple ID. Ensure your home number is active here too.

Avoid toggling iMessage or FaceTime OFF/ON while abroad. It can trigger a fresh activation SMS charged at international rates by your carrier.

4) WhatsApp: keep the same number

• Open WhatsApp > Settings > Account > Two‑step verification: ensure it’s ON.
• Do not use “Change Number” unless you are permanently changing numbers.
• If WhatsApp shows “Did you change your number?” after it detects a SIM change, tap “No”.
• If asked to re‑verify, only proceed if you can receive the SMS/voice call to your home number. Otherwise, force‑quit and reopen when you have signal for your home line or Wi‑Fi Calling.

Pro tip: Link WhatsApp Web/Companion on your laptop or tablet before you fly so you can keep chatting even if your phone is briefly offline.

Set up on Android (dual‑SIM/eSIM)

Android menus vary by brand, but the flow is similar.

1) Install and label your eSIM

• Settings > Network & Internet > SIMs (or Connections > SIM Manager) > Add eSIM.
• Label clearly: SIM 1 = Home, eSIM/SIM 2 = Travel.

2) Assign data, calls and SMS

• Preferred SIM for:
• Mobile data: Travel.
• Calls: Home.
• SMS: Home.
• Turn off Data Roaming on the Home SIM.
• Keep the Home SIM enabled so you can receive SMS/OTP.

Pro tip: Some Android phones let you choose SIM per contact in the dialler/Contacts. Set important contacts to always use your Home line.

3) Messages, RCS and Google account sanity checks

• Google Messages (RCS chat features) may try to verify your number via SMS when re‑enabled. If prompted abroad, choose “Not now” to avoid a charge, or connect to Wi‑Fi with the Home SIM able to send one activation SMS.
• Generate and save Google backup codes before you go, and add a recovery email/phone.

4) WhatsApp: same number, new data

• Confirm WhatsApp is registered to your Home number.
• Keep two‑step verification ON with your 6‑digit PIN.
• If you see a SIM‑change prompt, choose “No” unless you’re truly changing numbers.
• Re‑verification requires SMS/voice to your Home number; do this only when you have coverage and are comfortable with any roaming SMS cost.

Common prompts and how to respond

• WhatsApp “Change number?” detected:
• Choose “No”. You’re only using a different data connection, not changing identity.
• iMessage wants to reactivate:
• Don’t toggle iMessage/FaceTime while abroad.
• If it deactivates unexpectedly, you can temporarily use your Apple ID email for send/receive, or reactivate knowing one international SMS may be charged by your carrier.
• Google Messages RCS activation:
• Select “Not now” and activate later on Wi‑Fi, or accept that one SMS may be sent.
• SIM change notifications:
• These are informational. As long as you don’t re‑register WhatsApp with a new number, your account stays tied to your Home number.

Pro tip: If you absolutely must remove your Home SIM, ensure every critical account has alternative 2FA (backup codes, authenticator app, recovery contacts) and that iMessage is set to send/receive via your Apple ID email.

Troubleshooting quick fixes

• iMessage shows email instead of number:
• Settings > Messages > Send & Receive: select your phone number. If it won’t tick, your Home line may lack coverage for activation. Use your Apple ID email temporarily and try activation later when the Home line has signal.
• Not receiving WhatsApp codes:
• Ensure the Home line is enabled and can receive SMS. Try voice call verification. If you can’t get the code, use WhatsApp Web on a linked device to stay connected until you can re‑verify.
• Calls/SMS going out on the wrong line:
• iPhone: Edit contact > Preferred Line, or long‑press the SIM label on the call screen.
• Android: Set default SIM in the dialler or choose per call/SMS if prompted.
• Data still draining on Home SIM:
• iPhone: Settings > Mobile Data > turn off “Allow Mobile Data Switching”.
• Android: Ensure Preferred Data SIM = Travel and Data Roaming is off on Home.
• Can’t install eSIM:
• Confirm your phone is carrier‑unlocked and eSIM‑capable. Reboot and retry. If travelling to the US, check compatibility with Esim United States guidance; for Europe, see Esim Western Europe.

Real‑world setups

• One country, maximum simplicity:
• Example: Weekend in Paris. Install a France data plan, set it as Mobile Data, keep your UK SIM for calls/SMS only. See Esim France.
• Multi‑city Euro trip:
• Example: Italy–Spain–France in one week. Use a regional plan so you don’t juggle multiple profiles. See Esim Western Europe or country packs like Esim Italy and Esim Spain.
• North America loop:
• Example: US and Canada. Use Esim North America and keep your home line for OTPs and inbound calls. If only the US, see Esim United States.
• Business travellers:
• Centralise policy and support so staff don’t toggle iMessage abroad or re‑register WhatsApp. Volume options are available For Business, and partners can access enablement via the Partner Hub.

Browse full coverage and plans on Destinations.

FAQ

• Will people still see my usual number on WhatsApp?
• Yes. WhatsApp identity stays tied to the number you registered. Using a travel eSIM only changes your data connection, not your WhatsApp number.
• Do I need to use “Change Number” in WhatsApp when I travel?
• No. Only use “Change Number” if you are permanently moving to a new number. For travel, keep your existing registration.
• Can I remove my home SIM entirely?
• You can, but you may lose access to SMS/OTP and iMessage number activation. It’s safer to keep the home line inserted and disable its data roaming. If you must remove it, set up backup codes, an authenticator app, and Apple/Google recovery options first.
• Will iMessage charge me abroad?
• iMessage itself uses data. However, (re)activating iMessage on a phone number can send one international SMS charged by your carrier. Activate before departure and avoid toggling while abroad.
• Can I still receive SMS/OTP if data roaming is off on my home SIM?
• Usually yes; SMS does not require data. Whether receiving SMS while roaming is charged depends on your carrier. Check your plan before you go.
• WhatsApp asked me to verify again – what now?
• Proceed only if your home number can receive the SMS/voice code. If not, wait until you have coverage or Wi‑Fi Calling, or use linked devices temporarily. Ensure two‑step verification is enabled to protect against SIM‑swap attacks.

Next step: Choose your travel eSIM and stay connected without losing your number. Start with Destinations.

Cruise internet is a tale of two worlds: slow, pricey satellite Wi‑Fi at sea and fast, cheap mobile data the moment you dock. The smartest approach is a “port‑day eSIM switch” — use reliable, low‑cost mobile data in port, then fall back to the ship’s Wi‑Fi only when you truly need it at sea. This playbook explains how to plan eSIMs by port, switch safely without bill shock, keep messaging working, and use offline tools so your trip runs smoothly. Expect plain-English guidance, realistic speed expectations, and simple checklists to make it work across the Med, Caribbean, Alaska, and beyond. Whether you’re a holidaymaker looking to post photos in port or a remote worker who must stay reachable, this strategy will minimise costs, preserve battery, and keep you connected where it actually matters. You’ll also find example eSIM picks by itinerary, device settings to avoid maritime roaming traps, and pro tips to stretch every megabyte.

What “cruise internet” really is (and isn’t)

• At sea: your phone cannot see land-based mobile towers. Any “mobile” network that appears is usually a maritime roaming network (e.g., “Cellular at Sea” or similar) billed at extreme pay‑per‑MB rates. Avoid these entirely.
• Onboard Wi‑Fi: provided via satellite. It works ship‑wide but is shared by thousands of passengers. Think high latency (600–900 ms typical), bursty speeds, and content restrictions. Useful for messages, email, and light browsing. Streaming can be hit‑and‑miss unless you pay for a top-tier plan.
• In port (or close to shore): your phone can use normal mobile networks. This is where an eSIM shines: fast LTE/5G, low cost per GB, hotspot support, and predictable performance.

Bottom line: rely on eSIM data in port; use ship Wi‑Fi at sea for essentials; keep your home SIM and maritime networks out of the loop to avoid bill shock.

The Port‑Day eSIM Strategy (high level)

1. Before you sail, add regional/country eSIMs tailored to your ports.
2. While at sea, keep your phone in Airplane Mode with Wi‑Fi on; use the ship’s Wi‑Fi sparingly.
3. As you dock, disable Airplane Mode, switch mobile data to your travel eSIM, and go online at local rates.
4. Repeat per port; download offline maps and content ahead of time to minimise live data needs.

Browse options by country or region on Destinations. For multi-country trips, look at Esim Western Europe or Esim North America. For single-country stops, check Esim Spain, Esim France, and Esim Italy. US departures or overnights? See Esim United States.

Pre‑cruise checklist: set yourself up

• Map your ports and dates
• Note time in port and overnight stays.
• Group ports by region to decide between a regional eSIM (easier) vs per‑country eSIMs (cheaper per GB).
• Check device compatibility
• Confirm your phone supports eSIM and is unlocked.
• Pick your eSIM plan(s)
• Western Med (Spain/France/Italy): Esim Western Europe is the simple pick; or combine Esim Spain, Esim France, Esim Italy for heavy usage in one country.
• Caribbean with a US stop: Esim North America plus Esim United States coverage as needed.
• Install eSIM(s) before you sail
• Add them to your phone and label clearly (e.g., “EU eSIM”).
• Do not enable data roaming on your home SIM.
• Download offline essentials (per port)
• Maps (Google Maps/Apple Maps), city guides, translation packs, transit schedules, and ride‑hail apps.
• Entertainment and podcasts for sea days.
• Messaging readiness
• Ensure WhatsApp/Telegram/Signal are installed and logged in.
• If you use iMessage/FaceTime, confirm they work on Wi‑Fi only.
• Payment and security
• Enable offline modes for wallets where supported.
• Set up VPN if your company requires it (remote workers: see For Business).

Pro tip: Create a “Cruise” Home Screen page with your travel apps and widgets (clock for home time zone, calendar, maps).

Onboard days: reality check and best use of ship Wi‑Fi

Expect high latency and variable speeds subject to congestion, weather, and ship hardware. Use it for: - Text and low‑resolution photo messaging - Email (set to manual fetch or low-frequency sync) - Essential work chat (Slack/Teams) with notifications only - Basic browsing and booking changes

Avoid: - Big OS/app updates and cloud photo backups - Video calls (unless on a premium package and off‑peak) - Streaming in HD

Workarounds: - Schedule uploads for port days. Queue photos and videos but pause sync until docked. - Use “Low Data Mode” (iOS) or “Data Saver” (Android). - Compress photos before sending; use “Less Data” options in chat apps. - Try audio‑only calls over Wi‑Fi if video stutters.

Port days: switch to eSIM and get things done fast

A simple, repeatable routine: 1. As the ship docks, wait for the “mobile signal” icon to appear. 2. Disable Airplane Mode. 3. Set Mobile Data to your travel eSIM. Keep your home SIM active for calls/SMS only if needed, but leave Data Roaming OFF on the home line. 4. If data doesn’t start, toggle Data Roaming ON for the travel eSIM and confirm APN settings provided in your eSIM install notes. 5. Turn on Personal Hotspot if you want to share with family devices (best value in port). 6. Open your to‑do list for the day: maps, transport, restaurant bookings, content uploads, backups.

Pro tips: - Offline maps per port save battery and data. Update with a quick “refresh” when you first connect in port. - If coverage is dense, let the phone choose the best local network automatically; if you see flapping, try manual network selection. - Banking and ride‑hail apps may challenge logins in new countries; keep SMS/Authenticator access handy. - Leave port with at least 30 minutes to spare for any queued cloud syncs.

Example itineraries and eSIM picks

• Western Mediterranean (Barcelona–Marseille–Genoa–Rome–Naples)
• Easiest: Esim Western Europe to cover Spain, France, and Italy on one plan.
• Power users: Pick larger data buckets in Esim Spain, Esim France, and Esim Italy if you’ll stream or hotspot heavily in a single country.
• Eastern Caribbean with Miami turn
• Regional plan: Esim North America for US coverage plus supported nearby destinations.
• If spending extra days in the US before/after: add Esim United States with a larger data allocation.
• Alaska (Seattle/Vancouver turn with Canadian port)
• Combine Esim North America for US/Canada coverage so you don’t need to swap mid‑trip.

Not sure? Explore countries and regions via Destinations.

Costs: a realistic comparison

• Maritime roaming (at sea on “cellular at sea”):
• Commonly charged per MB at premium rates. Even a few photos can cost more than a day of ship Wi‑Fi. Best avoided entirely.
• Ship Wi‑Fi:
• Day passes often priced per device, sometimes tiered (basic vs streaming). Good for light use; speeds vary.
• Port‑day eSIM:
• Low cost per GB, 4G/5G performance, and hotspot support included. Ideal for uploads, map/navigation, and all heavy tasks.

A practical mix: - Buy the smallest ship Wi‑Fi plan that keeps you reachable at sea. - Put your heavy data needs into port windows using eSIM. - If you travel as a family, one larger eSIM data pack with hotspot sharing in port can be excellent value.

Settings that prevent bill shock at sea

iOS (iPhone): - Settings > Mobile Data - Set “Mobile Data” line to your travel eSIM when in port; switch back to “Off” at sea. - For your home line, tap it and turn off “Data Roaming.” - Airplane Mode at sea, Wi‑Fi ON for ship Wi‑Fi. - Disable Wi‑Fi Assist (Settings > Mobile Data > Wi‑Fi Assist OFF). - Low Data Mode ON during sea days.

Android (varies by brand): - Settings > Network & Internet > SIMs - Turn OFF Data Roaming on your home SIM. - Set your travel eSIM as the “Preferred SIM for data” in port. - Airplane Mode at sea, then turn Wi‑Fi back ON. - Disable “Switch to mobile data” or “Adaptive connectivity” features that might sneak data. - Enable Data Saver on sea days.

General: - Do not connect to any “cellular at sea” network. Airplane Mode prevents accidental attachment. - Remove or pause auto‑updates and cloud backups until you’re in port.

How to juggle ship Wi‑Fi and port‑day eSIM (step‑by‑step)

• The evening before a port: 1. Queue uploads (photos/video) but pause cloud sync. 2. Download offline maps and transit info for the next port. 3. List tasks you’ll complete in port (banking, large app updates, content posts).
• As you dock: 1. Disable Airplane Mode. 2. Select your travel eSIM for mobile data and enable data roaming on it if required. 3. Run through your task list; hotspot to family if needed.
• Departing port: 1. Finish uploads 30 minutes before sail‑away. 2. Switch back to Airplane Mode; turn Wi‑Fi ON for ship access. 3. Keep cloud backups paused until the next port.

Messaging that works everywhere

• iMessage/FaceTime: run fine on ship Wi‑Fi for text and audio; video can struggle.
• WhatsApp/Telegram/Signal: reliable for text and compressed media; enable “low data” options.
• Wi‑Fi Calling: many carriers allow it on ship Wi‑Fi; enable in phone settings. If your carrier blocks it, use app‑based calling.

Pro tip: Tell close contacts you’re “real‑time in port, delayed at sea.” It sets expectations and reduces pressure to stay online on slow satellite links.

For teams and frequent cruisers

• Remote work: If you must remain reachable, pair minimal ship Wi‑Fi with disciplined port‑day sprints for heavy tasks. Your IT team may require a VPN — set and test it before sailing. See For Business.
• Travel agents and group organisers: Simplify group comms with a shared eSIM plan per cabin for port days. Explore partnerships on Partner Hub.

FAQ

• Will my eSIM work at sea?
• No. eSIMs use land-based mobile networks. At sea, only ship Wi‑Fi or expensive maritime roaming is available. Keep your phone in Airplane Mode at sea and use Wi‑Fi.
• Can I keep WhatsApp and iMessage working without buying the top Wi‑Fi package?
• Usually, yes. Texts and low‑res photos work on basic ship Wi‑Fi. For video calls or large media, wait for port and use your eSIM.
• How do I avoid charges on my home SIM?
• Turn off Data Roaming on your home SIM, use Airplane Mode at sea, and set your travel eSIM as the data line in port. Disable Wi‑Fi Assist/auto “switch to mobile data.”
• Should I buy the cruise line Wi‑Fi?
• Buy the smallest plan that covers your needs at sea (messaging, email). Push all heavy tasks to port with eSIM data. If you need video calls at sea, expect to pay for the top tier and still see variability.
• Can I hotspot to family devices?
• Yes, in port with your eSIM it’s usually fine and cost‑effective. Onboard, hotspots may be blocked and performance is limited — not recommended.
• What if my itinerary spans many countries?
• Choose a regional plan like Esim Western Europe or Esim North America. For deep usage in one country, add a larger single‑country plan such as Esim Spain or Esim United States.

The bottom line

Cruise internet isn’t all‑or‑nothing. Use ship Wi‑Fi at sea for the basics, and make port days your high‑speed windows with a well‑chosen eSIM. Plan your eSIMs by region, download offline tools per port, control your phone’s data settings, and batch heavy tasks for when you’re docked. You’ll stay connected, avoid shock bills, and actually enjoy the voyage.

Next step: Map your itinerary and pick the right eSIMs on Destinations.

Travellers weigh “pocket WiFi vs eSIM” for the same reason: reliable data at a fair price with minimal faff. Both connect you to local 4G/5G networks; the difference is how. A pocket WiFi is a rented hotspot you carry and charge, while an eSIM is a downloadable data plan that lives in your phone. This guide cuts through marketing to compare real‑world costs per GB, speed and latency, security risks, and multi‑device sharing. You’ll also find quick setup steps, a 60‑second chooser checklist, and regional notes for the United States, Western Europe and North America.

Short answer: eSIMs are usually cheaper per GB, faster to set up, and easier to manage. Pocket WiFi can still suit groups who need to share to many devices or travellers with older/locked phones. If you’re eSIM‑compatible, a travel eSIM will cover most trips with less to carry, fewer fees, and better control over usage.

Explore country and regional plans on Destinations.

Quick verdict: who should pick what?

• Choose eSIM if:
• You have an eSIM‑compatible and unlocked phone.
• You value cost control (buy exactly the data you need).
• You want faster setup (scan and go) and no device returns.
• You’ll hotspot a handful of devices (check tethering is allowed).
• Choose pocket WiFi if:
• Your phone does not support eSIM or is carrier‑locked.
• You need to share to 8–10+ devices all day without draining your phone.
• Your employer mandates separate networking hardware.
• Tie-breakers:
• Battery: eSIM uses your phone’s battery; pocket WiFi is a second battery to manage.
• Loss risk: eSIM cannot be “lost”; pocket WiFi loss/damage fees can be steep.
• Coverage: both ride the same local networks. With eSIM you can pick plans that use top carriers in your destination (e.g. Esim United States, Esim France).

Cost comparison: pocket WiFi vs eSIM

The biggest hidden difference is total cost per GB once you account for deposits, delivery/return, and “unlimited” fair‑use caps on pocket WiFi.

Typical retail price/GB (indicative ranges)

These are common market ranges for tourists buying short‑term plans. Always check current pricing for your destination on Destinations.

Region / Country

eSIM price/GB (typical)

Pocket WiFi effective price/GB (typical)

Notes

Western Europe

$1.5–3/GB

$2.5–8/GB

“Unlimited” WiFi often has 1–5GB/day high‑speed, then throttled. See Esim Western Europe.

France / Italy / Spain

$1.5–3/GB

$2–6/GB

Strong competition; local eSIMs are very cost‑effective. See Esim France, Esim Italy, Esim Spain.

United States

$3–6/GB

$4–10/GB

Pocket WiFi often adds delivery and loss fees. See Esim United States.

North America (US/CA/MX)

$2.5–5/GB

$5–12/GB

Regional roaming on hotspots costs more. See Esim North America.

How we think about “effective price/GB”: - Pocket WiFi day‑rates are divided by the daily high‑speed allowance (before throttling). Delivery/return and deposits increase the effective rate. - eSIMs are sold in fixed data buckets (e.g., 5–20GB). You pay only for what you buy; topping up keeps costs predictable.

Hidden costs pocket WiFi renters often miss: - Delivery and return fees (airport counters can be pricier; postage both ways adds up). - Deposits and loss/damage charges (commonly $100–$250 if lost; cases and cables also chargeable). - Fair‑use policies that throttle after a small high‑speed cap (throttled data is often too slow for maps/video). - Late return penalties if flights change.

Pro tip: If you’re a couple using ~6–8GB each over a week in Europe, two eSIMs commonly beat one pocket WiFi on cost—and remove delivery/return hassle.

Speed, latency and reliability

Both pocket WiFi and eSIM ultimately use the same local 4G/5G networks. Differences are mostly practical, not theoretical.

• Raw speed: Similar. Your phone with an eSIM can connect directly to 5G; many rental hotspots are 4G‑only or support fewer bands, which can limit peaks.
• Latency: eSIM is often 5–20 ms lower because there’s no extra WiFi hop and router processing. It’s noticeable on calls/gaming, not much for maps.
• Throttling: Pocket WiFi “unlimited” plans frequently throttle after a daily cap. eSIM plans throttle only after you use your purchased allowance (or not at all, depending on plan).
• Reliability: One fewer device means one fewer point of failure. With eSIM you avoid WiFi drops between your phone and a hotspot. Pocket WiFi can overheat or crash under many clients.

Pro tip: If performance matters (video calls, hotspotting a laptop), prefer an eSIM plan that includes 5G where available and test speed in the first hour; top up if needed.

Security and privacy on the road

• eSIM on your phone:
• Uses cellular encryption end‑to‑end; no shared SSID.
• Fewer attack surfaces than carrying a router with a web admin panel.
• Your phone’s hotspot can be password‑protected with WPA2/3.
• Pocket WiFi:
• Safe if configured well, but risks include default/weak passwords, outdated firmware, and rogue admin access if not reset.
• Physical loss exposes stored SSID/passwords; some models display the password on the screen.
• Shared hotspots in groups increase chances of shoulder‑surfing or unauthorised joins.

Security best practices: - Change the hotspot/router password immediately. Use WPA2/3 and a unique SSID. - Disable WPS and remote admin on pocket WiFi. - Keep device firmware updated (if you control the device). - Prefer your own eSIM hotspot over random public Wi‑Fi in cafés/airports.

Multi‑device sharing: eSIM hotspot vs pocket WiFi

You can share eSIM data via your phone’s hotspot, often to 5–10 devices, subject to plan limits.

• eSIM hotspot advantages:
• No extra rental hardware; share instantly with your laptop, tablet, or a partner.
• Many travel eSIMs allow tethering; check the plan details before purchase.
• One SIM per person keeps usage fair and avoids a single point of failure.
• eSIM hotspot caveats:
• Tethering can drain your phone faster. Carry a 10,000–20,000 mAh power bank.
• Some carriers block or cap tethering; verify in the plan FAQ.
• Pocket WiFi advantages:
• Designed to share (commonly 8–15 devices).
• Keeps your phone free and reduces its battery drain.
• Pocket WiFi caveats:
• One shared connection means if the owner walks away, everyone loses internet.
• Extra device to charge and carry; range is limited (hotel rooms fine, large villas less so).

Pro tip: For families, mix approaches—primary travellers each run an eSIM; turn on a hotspot only when the group needs it. This keeps speeds high and batteries happy.

Practicalities: setup, pick‑up and returns

How to install and activate a travel eSIM (step‑by‑step)

1. Check compatibility and unlocked status in your phone settings.
2. Buy a plan for your destination (e.g., Esim Western Europe, Esim North America, or browse Destinations).
3. Receive your eSIM (QR code or manual code) by email.
4. On Wi‑Fi, scan the QR or enter details to add the eSIM plan.
5. Set the eSIM as “Mobile Data” and keep your primary SIM for calls (if desired).
6. Turn on Data Roaming for the eSIM line.
7. Optional: Set the APN if provided. Restart the phone.
8. Test: open a webpage and a maps app. If slow, toggle airplane mode or reboot.

Pro tips: - Install the day before you fly; activate only when you land if the plan timer starts on first connection. - Set a data warning in Settings at 80% of your allowance.

How to use a pocket WiFi (checklist)

• Before trip:
• Order for the correct countries and dates; confirm daily high‑speed cap.
• Arrange delivery/pick‑up (airport counter hours, hotel delivery).
• Note deposit, loss/damage fees, and return process.
• On trip:
• Fully charge the hotspot each morning.
• Change SSID/password; disable WPS.
• Share the password securely with your group.
• Monitor LEDs/app for cap/throttle status.
• After trip:
• Return on time, in full kit (device, cable, charger, pouch) to avoid fees.
• Keep proof of return/shipping.

Business and team travel: what scales best?

For teams, the tipping point is management overhead. eSIMs scale neatly: issue plans per traveller, tag costs to projects, and avoid device logistics. Pocket WiFi can work for event booths or shared tablets, but devices go missing and shipping gets messy.

• Centralised purchasing and usage controls are easier with eSIM dashboards. See Simology For Business.
• Partners and resellers setting up client connectivity can streamline with our Partner Hub.

How to choose: a 60‑second checklist

• Phone supports eSIM and is unlocked? If no, lean pocket WiFi.
• Travelling solo or as a couple? eSIM usually wins on cost and simplicity.
• Need to share to 8–10 devices all day? Consider pocket WiFi (or carry a power bank for eSIM hotspot).
• Worried about deposits/returns? eSIM—nothing to ship or return.
• Crossing multiple countries? Choose a regional eSIM (e.g., Esim Western Europe or Esim North America).
• Security‑conscious? eSIM hotspot > public Wi‑Fi; avoid default router passwords.

Regional notes and examples

• United States: Coverage and speed vary by city and band support. Picking an eSIM that rides strong nationwide networks is key. Start with Esim United States.
• Western Europe: Competitive pricing and dense 5G make eSIMs excellent value. Multi‑country plans reduce SIM juggling. See Esim Western Europe.
• France, Italy, Spain: City and resort areas enjoy strong 4G/5G; eSIMs are typically the cheapest per GB. Compare Esim France, Esim Italy, and Esim Spain.
• North America: If you’ll cross into Canada or Mexico, a regional eSIM beats pocket WiFi roaming on cost and simplicity. See Esim North America.

FAQ

• Is eSIM as fast as a local physical SIM? Yes. eSIM is just a digital form of a SIM profile. Speeds depend on network coverage and plan, not the SIM form.
• Can I tether with an eSIM? Usually yes, but it depends on the plan. Most travel eSIMs allow hotspotting; check plan details. Some carriers cap tethering speeds or data.
• What if my phone is carrier‑locked? You may not be able to use a third‑party eSIM. Options: ask your carrier to unlock, use a pocket WiFi, or carry an unlocked secondary device for the eSIM.
• What happens when I run out of eSIM data? You either top up in‑app/online or buy another plan. Many travellers buy slightly more than needed to avoid mid‑trip disruption.
• Are “unlimited” pocket WiFi plans really unlimited? Typically not. Most have a daily high‑speed cap (e.g., 1–5GB) and then throttle severely. Check fair‑use policy specifics.
• Will a pocket WiFi work on flights or remote areas? It depends on terrestrial mobile coverage—just like your phone. No in‑flight cellular. In remote areas, neither option works well without coverage.

Next step: Compare region‑ready travel eSIMs for your trip on Destinations.

Moving country is exciting and admin-heavy. Your phone setup shouldn’t be the bottleneck. This playbook is your first 30-day guide to connectivity: land with instant data, pass eKYC to get a local number, keep your banking OTPs flowing, and decide what to do with your existing number. The short version: use an arrival eSIM for expats for day-one data and calls via apps, then transition to a local SIM once you’ve cleared identity checks and have an address. Along the way, make smart use of OTT apps and (optionally) a VoIP number for continuity. We’ll show you how to hand off cleanly, avoid number-porting headaches, and set yourself up so utilities, HR systems, and banks accept your phone number on the first try. If you’re relocating with a family or as part of a corporate move, the same steps apply—just scale the checklists and keep all ICCIDs and IDs organised.

The 30‑Day Game Plan at a Glance

• Days 0–3: Install a travel eSIM before you fly. Land with data, navigation, and app calls working. Keep your home SIM active for OTPs.
• Days 3–14: Clear eKYC and buy a local prepaid SIM (or eSIM). Prioritise SMS reliability for banks and utility sign-ups.
• Days 7–21: Handoff: set the local SIM as default for calls/SMS, keep the travel eSIM as backup data. Update critical accounts.
• Days 14–30: Decide on number porting (home number to VoIP or local carrier) and lock in long-term plans.
• Ongoing: Use OTT apps smartly, maintain a backup data option, and document your 2FA methods.

Pro tip: Use dual-SIM settings to keep control—one line for data, the other for voice/SMS—until you’re fully settled.

Step 1: Land Ready with a Travel eSIM (Days 0–3)

A travel eSIM gives you instant data on arrival without hunting for a shop. It’s the best start for navigation, temporary accommodation check-ins, and messaging.

• Where to buy: Browse regional and country packs on Destinations, including Esim Western Europe, Esim North America, or singles like Esim United States, Esim France, Esim Italy, and Esim Spain.
• Why eSIM first: No paperwork, immediate activation, predictable costs, and you keep your home SIM in the device for OTPs and critical calls.

Checklist: Before you fly 1) Check your phone’s eSIM compatibility and carrier lock status. 2) Purchase and install the eSIM profile (QR or in-app) while you still have Wi‑Fi. 3) Set the travel eSIM as your mobile data line; turn off data roaming on your home SIM. 4) Test: open maps, send a message, and confirm your home line can still receive SMS. 5) Pack a paper copy or screenshot of the eSIM QR in case you need to re-add it.

Pro tips: - Keep your home SIM active for banking OTPs and account access. - WhatsApp keeps your existing number unless you explicitly change it; you can use data from the travel eSIM with WhatsApp tied to your home number.

Step 2: Tackle eKYC and Buy a Local SIM (Days 3–14)

You need a local number for banks, employers, and utilities. In many countries, SIMs are registered (eKYC), so you’ll be asked for ID and sometimes proof of address or a tax ID.

What to expect by region (common patterns, specifics vary): - France: ID required for SIM registration; postpaid often needs an IBAN and local address. - Spain: Passport/NIE for registration; prepaid easiest for newcomers. - Italy: Passport plus Codice Fiscale (tax code) commonly requested; keep your SIM packaging. - United States: Prepaid requires ID at point of sale in some states; postpaid usually needs a credit check and SSN/ITIN. Consider prepaid initially.

Choosing the right product: - Start with prepaid to avoid credit checks and long contracts. - Ensure the plan includes SMS (for OTPs) and enough data. Voice minutes are useful for local calls to landlords, HR, and utilities. - Ask for an eSIM if your device supports it; otherwise, a physical SIM is fine.

Shop visit checklist 1) Bring your passport and any local identifiers (e.g., address proof, Codice Fiscale, NIE) if you have them. 2) Choose prepaid with 10–20 GB data, unlimited local SMS, and minutes. 3) Activate in-store and have them place a test call and send/receive an SMS. 4) Save the contract/receipt and the ICCID (SIM number) for future porting.

Pro tips: - Test OTPs: send yourself an SMS from another line or ask the shop to verify incoming SMS. Reliability trumps price early on. - If you’re moving across multiple Schengen countries, consider Esim Western Europe to bridge until your local line is set.

Step 3: Handoff—Move Data and Services to the Local Line (Days 7–21)

Once your local SIM works, shift critical services gradually.

Dual-SIM handoff (iOS/Android) 1) Set your local SIM as the default for Voice and SMS. 2) Keep your arrival eSIM as the default Data line for a few days while you test local network quality; then switch Data to the local SIM. 3) Disable data on your home SIM to avoid roaming charges, but keep it active for remaining OTPs until you update your accounts. 4) Label lines clearly in settings (e.g., “Local” and “Home/Travel”).

Update critical accounts - Banks: change your registered number to the local SIM only after confirming SMS reliability. - Government, health, and tax portals: often require a local number—schedule these updates once you have stable reception at home. - Messaging apps: confirm which number each app is using.

Pro tip: Move services in layers—banking first, then utilities, then everything else—so you always have a fallback line for OTPs.

Step 4: Number Porting—Keeping or Moving Your Old Number

Decide what to do with your home-country number and any temporary numbers you’ve acquired.

Common scenarios - Keep home number for inbound only: Park it with a VoIP/virtual number provider for low-cost roaming reception and voicemail-to-email. - Fully move: Port your home number to a VoIP provider you can use globally, or port into a local carrier if you’re permanently relocating and want to keep the number active for inbound calls from home. - Port a temporary local number to your preferred local carrier after you pick a long-term plan.

General porting rules - Do not cancel the line you’re porting; it must be active. - Gather required identifiers: account number, port-out PIN, ICCID, or country-specific codes. - Expect a short downtime window (usually minutes to a few hours) during the cutover.

Country notes (practical specifics) - France: Obtain your RIO code by calling 3179 from the line you want to port. Provide RIO to the new operator; porting usually completes in 1 working day. - Spain: Porting typically completes in 1–2 working days; bring ID and the SIM’s ICCID. Night-time cutovers are common to minimise disruption. - Italy: Have your Codice Fiscale and current SIM ICCID. Prepaid-to-prepaid ports are common and usually smooth in 1–3 days. - United States: You’ll need the account number and port-out PIN (different from your login PIN). Prepaid accounts sometimes require a special porting PIN requested via SMS.

Pro tips: - Schedule ports mid-week, early in the day, and avoid public holidays. - Keep both SIMs inserted during the port so you can detect when the old line goes inactive and the new one activates.

OTPs, Banking and Utilities: Make Them Work First Time

Banks and services can be strict about which numbers they accept.

• OTP reality: Many banks reject VoIP numbers for SMS 2FA. Use a local mobile number for the update.
• App-based 2FA: Where available, switch to app-based authenticators or push approvals; these are number-agnostic and travel well.
• Utility sign-ups: Energy, broadband, and mobile wallets often send verification codes. Use your local SIM and ensure it has weekday reception where you live.

Practical flow 1) Keep your home SIM active for initial banking access. 2) Once your local line is tested, update your bank profile to the local number. 3) Switch services that allow app-based 2FA to an authenticator app. 4) Document which services still rely on SMS so you know to keep that line active.

Pro tip: Add a secondary recovery method (email or backup codes) wherever possible before you travel.

OTT Apps and Virtual Numbers for Continuity

Messaging and calling apps can smooth your move—but use them intentionally.

• WhatsApp: You can keep your home number for WhatsApp while using local data. If you prefer to switch, use WhatsApp’s “Change Number” to migrate chats and groups.
• Telegram/Signal: Similar flexibility; both can run on a device with data from any SIM.
• VoIP/virtual numbers: Great for inbound calls from your home country and for publishing a stable contact when you might change SIMs. However, don’t rely on VoIP for banking OTPs, as many institutions block them.
• Business users: Consider a cloud telephony setup so your team line stays stable during relocation. See For Business for options that scale across teams.

Pro tip: Label your contacts to reflect where they should call you (e.g., “Call on WhatsApp” vs “Call mobile”) during your transition month.

Country Snapshots and eSIM Picks

• France: Start with Esim France, then switch to a local prepaid with strong SMS reliability for banking. Remember the RIO process for porting.
• Italy: Use Esim Italy while you get your Codice Fiscale and address sorted. Porting usually needs the ICCID; keep packaging.
• Spain: Esim Spain covers arrival; many services expect a Spanish mobile for onboarding—prepaid is the quickest path.
• United States: Esim United States for landing; consider prepaid first, then postpaid once you have credit history. Ports need account number and port-out PIN.
• Multi-country: If you’re doing side trips or moving within the region, use Esim Western Europe or Esim North America during your first month.

For other countries and bundles, head to Destinations.

Common Pitfalls to Avoid

• Cancelling before porting: Never cancel a number you plan to port.
• OTP dead-ends: Updating a bank to a VoIP number that can’t receive their OTPs.
• Wrong default line: Accidentally using data on your home SIM and incurring roaming fees—double-check defaults.
• Losing the ICCID: You’ll need it for support and porting; photograph SIM packaging.
• eSIM transfer surprises: Some devices limit eSIM transfers; keep your eSIM activation details safe.
• Over-optimising too early: Keep the travel eSIM until your local setup is bulletproof.

Checklist: Your First 30 Days

• Before travel:
• Buy and install an arrival eSIM; test data.
• Label lines and disable home SIM data roaming.
• List critical services needing 2FA.
• Days 0–3:
• Land and verify connectivity.
• Keep home SIM ready for OTPs.
• Days 3–14:
• Complete eKYC and buy a local prepaid SIM/eSIM.
• Test inbound/outbound SMS and a local call.
• Start updating banks and essential services.
• Days 7–21:
• Set local SIM as default for calls/SMS, then for data.
• Migrate services to app-based 2FA where possible.
• Decide on porting strategy for your home number.
• Days 14–30:
• Execute number port(s) if needed.
• Pick a long-term local plan.
• Keep the travel eSIM active as a backup until you’re fully stable.

FAQ

• Is an eSIM for expats enough for the whole first month?
• Often yes for data and OTT calls, but many banks/utilities require a local mobile number for SMS verification. Plan to add a local SIM within 1–2 weeks.
• Will changing my SIM affect WhatsApp?
• No, WhatsApp stays tied to the number you registered with until you use “Change Number.” You can use local or travel data regardless.
• Can I use a VoIP number for bank OTPs?
• Frequently not. Many banks block VoIP. Use a local mobile number for reliable OTP delivery and keep an app-based authenticator as backup.
• How long does number porting take?
• Typically 1–3 working days, with a short downtime window during the cutover. France often completes in 1 day (with RIO); Spain/Italy 1–2 days; the U.S. depends on your carrier and account type.
• Do I need local ID to buy a SIM?
• In many countries, yes. Prepaid usually has the lightest requirements. Bring your passport and any local identifiers you have (address proof, tax codes).
• What if my phone doesn’t support eSIM?
• Buy a physical SIM on arrival and follow the same handoff steps. You can still keep your home SIM in a dual-SIM phone, or carry it and swap as needed.

Next step: Choose your arrival plan and install it before you fly. Start with Destinations to pick the right eSIM for your first 30 days.

Heading abroad for a semester or a full degree? Staying connected is the backbone of a smooth start: maps for orientation week, group chats with classmates, OTPs from your bank, timetables, and calls home. An eSIM gives you local-rate data without the shock of roaming bills, keeps WhatsApp running on your usual number, and can be topped up remotely by parents or sponsors. This guide shows you how to set up an eSIM for students, pick the cheapest sensible plan for your study destination, and keep your home number active for security codes. You’ll also get safety tips and troubleshooting that work in the real world. Whether you’re off to Paris, Milan, Madrid, or New York, we’ll help you choose a regional or country plan now and switch on data the moment you land. Browse coverage by country on Destinations, or jump straight to Esim Western Europe or Esim North America.

Why eSIM beats roaming for study abroad

An eSIM is a digital SIM you install via QR code. It’s ideal for students:

• Low cost: Local and regional eSIMs usually beat home-network roaming by a large margin.
• Instant activation: Install before you fly; switch it on at the airport.
• Dual lines, one phone: Keep your home SIM for OTP banking and WhatsApp; use the eSIM for cheap data.
• Flexible durations: 7, 15, 30‑day and multi-month options, plus easy top-ups.
• Regional cover: One plan can cover multiple countries during weekend trips.

Pro tip: If you’ll travel widely across the EU, choose a regional plan like Esim Western Europe. For Canada/USA travel, look at Esim North America. If you’re staying in one country, a country-specific plan (e.g., Esim France, Esim Italy, Esim Spain or Esim United States) is often cheapest.

Pre-departure checklist for students

Run through this before you fly.

1) Confirm your phone supports eSIM and is unlocked
- iPhone XR/XS or newer, most recent Google Pixel, Samsung Galaxy S20+ and above support eSIM.
- Check your device settings: Search “eSIM” or “Add mobile plan”.
- Ask your home carrier to unlock your handset if it’s locked.

2) Decide your setup
- Keep your physical/home SIM inserted to receive OTP texts and calls.
- Use a local/regional data eSIM for affordable internet.
- Turn off Data Roaming on your home SIM to avoid accidental charges.

3) Pick the right plan and duration
- Short programmes or orientation? 10–15 GB for 2–4 weeks is usually enough.
- A semester? 20–40 GB per month is a good baseline if you have campus Wi‑Fi.
- Frequent city breaks in Europe? Choose Esim Western Europe.
- US/Canada semester? Choose Esim North America or Esim United States.

4) Share your plan details with family
- Let parents/sponsors know your chosen plan so they can top up or resend a QR if you lose yours.
- Store the QR/email in cloud notes.

5) Back up and update
- Update iOS/Android before travel.
- Back up contacts, photos, and authenticator codes.

Step-by-step: Installing and activating your eSIM

You can install at home over Wi‑Fi and activate on arrival, or install/activate at the airport after landing.

1) Buy your plan
- Choose your destination on Destinations and select a country or regional plan.
- Complete purchase; you’ll receive a QR code or activation link.

2) Add the eSIM to your phone
- iPhone: Settings > Mobile Data > Add eSIM or Add Mobile Plan > scan QR.
- Android (varies): Settings > Network & Internet > SIMs > Add eSIM > scan QR.
If you only have the activation code, select “Enter details manually”.

3) Label your lines
- Name the eSIM “Study Data” and your home SIM “Home OTP”.

4) Set defaults and roaming
- Set Mobile Data to use “Study Data” (the eSIM).
- Turn OFF Data Roaming on the “Home OTP” line.
- Leave Voice/SMS on “Home OTP” if you need to receive calls/SMS, but place most calls over WhatsApp/FaceTime.

5) Activate on arrival
- After landing, switch on the eSIM line and ensure Data Roaming is ON for that line (it’s local roaming within the plan’s coverage).
- Wait for signal; if no data, toggle Airplane Mode or reboot.

6) Test
- Load a map and a web page.
- Send yourself a WhatsApp message.
- Ask your bank to send a test OTP if possible.

Pro tips:
- APN usually configures automatically. If data won’t start, check the eSIM’s APN settings in your plan email and enter them manually.
- Keep the QR and plan email safe; you might need them if you switch phones.

Budget-friendly plan sizing for students

Use these guide rails to avoid overpaying.

• Light user (messages, maps, email, ride-hailing, occasional video): 5–10 GB/month.
• Typical student (classes, social media, light streaming on Wi‑Fi first): 15–25 GB/month.
• Heavy user (lots of video/Hotspot, off-campus housing with weak Wi‑Fi): 30–50 GB/month.

Regional picks:
- EU/Schengen semester with weekend trips: Esim Western Europe saves money compared with buying separate country plans.
- North American campuses and cross-border trips: Esim North America.
- Country stays: choose Esim France for Paris or Lyon, Esim Italy for Rome or Milan, Esim Spain for Barcelona or Madrid, or Esim United States for US campuses.

Ways to save:
- Use campus and accommodation Wi‑Fi for updates and video calls.
- Download lectures and playlists over Wi‑Fi.
- Turn off auto-play in social feeds.
- Enable Low Data Mode/Data Saver in your phone settings.
- Share a single, larger regional plan across trips rather than buying multiple short plans.

Keeping your number for OTPs and WhatsApp continuity

Banks, government portals, and university systems often send one-time passwords (OTPs) to your home number. Here’s how to keep that working while using a local data eSIM.

• Keep your home SIM in the phone and active for calls/SMS, but with Data Roaming OFF to avoid fees.
• Set your iPhone/Android to use the eSIM for mobile data, keeping the home SIM for calls/SMS.
• WhatsApp: You can continue using your existing WhatsApp account tied to your home number even if data comes from the eSIM. Do not change your WhatsApp number unless you intend to move permanently.
• If your bank supports app-based authentication or email OTPs, enable them before you travel as a backup.
• If your home carrier offers Wi‑Fi calling at no extra cost, enable it to receive calls over Wi‑Fi when available.

Pro tip: If you must put your home SIM in a safe place (e.g., you’re using a single‑SIM phone), move critical services to app‑based authentication first and update recovery options before you leave.

Parental top-ups and remote support

Parents or sponsors can keep you connected without you sharing card details.

• They can purchase a new plan or top-up and forward the QR/activation email to you.
• Share your plan choice and timing so they buy the right validity window.
• Keep a shared note with your chosen eSIM product link (e.g., Esim Western Europe or Esim United States) to avoid mistakes.
• If you’re in a larger cohort, study-abroad offices can coordinate connectivity via For Business, and student organisations can explore benefits via the Partner Hub.

Safety and sensible settings for students abroad

A few settings and habits go a long way.

• Save local emergency numbers and your university’s 24/7 support line.
• Enable “Send Last Location” in Find My/Find My Device. Share your location with a trusted friend.
• Download offline maps for your host city and campus.
• Turn on data alerts and caps to avoid accidental overuse.
• Add campus security and programme coordinators as phone contacts.
• Keep a small balance on your home SIM for incoming SMS in case your carrier charges for it.

Troubleshooting: quick fixes

If things don’t work first time, try this sequence.

1) No data after landing
- Toggle Airplane Mode for 10 seconds.
- Ensure Mobile Data is set to the eSIM line.
- Turn Data Roaming ON for the eSIM line only.
- Manually select a network (Settings > Network Operators).

2) APN issues
- Check your plan email for APN details and enter them in the eSIM’s Access Point Name field.

3) iMessage/FaceTime not activating
- Temporarily set the eSIM line as your default for both data and iMessage activation; wait a few minutes, then switch defaults back.

4) Can’t receive bank OTPs
- Confirm the home SIM has signal.
- Turn off Do Not Disturb/Focus.
- Ask your bank to resend as SMS, not voice call.
- If your home SIM is out of balance for inbound SMS, top it up.

5) Battery drain
- Disable Background App Refresh on cellular for heavy apps.
- Use Low Power Mode and Low Data Mode.

6) Hotspot not working
- Check the plan allows tethering; if allowed, set the eSIM line as the data source, then enable Personal Hotspot.

Use-case snapshots by region

• United States semesters: Choose Esim United States for campus life, with Esim North America if you’ll visit Canada or Mexico on breaks. Data usage is higher stateside—size up your plan if you rely less on campus Wi‑Fi.
• France, Italy, Spain: City campuses mean strong public Wi‑Fi, so 15–20 GB often suffices. Country-specific plans like Esim France, Esim Italy or Esim Spain are cost‑effective if you mostly stay put.
• Wider European travel: Weekend trips across borders? Pick Esim Western Europe to avoid switching plans at every border.
• Mixed continent exchange: Starting in the US then heading to Europe? Combine a month of Esim United States with a follow‑on Esim Western Europe.

FAQ: eSIM for students

1) Should I buy my eSIM before or after I fly?
Buy before you fly if you can. Install over home Wi‑Fi and activate data on arrival. If you forget, airport Wi‑Fi is usually fine for purchase and installation.

2) Can I keep my WhatsApp number while using a data-only eSIM?
Yes. WhatsApp remains tied to your existing number. Use the eSIM for data and do not change your WhatsApp number unless you want to migrate permanently.

3) How do I receive bank OTPs abroad?
Keep your home SIM active for calls/SMS with Data Roaming OFF. Your phone will still receive SMS on that line. Where possible, enable app-based authentication as a backup before travel.

4) How much data do students typically need per month?
Most students manage on 15–25 GB with regular Wi‑Fi. If you stream a lot on the go or hotspot a laptop, consider 30–40 GB.

5) Can I hotspot from an eSIM?
Often yes, but it depends on the plan. Check your plan details. If allowed, set the eSIM as the active data line and enable Personal Hotspot.

6) My phone is locked to my home carrier. Can I still use an eSIM?
No. You’ll need an unlocked device to use a third‑party eSIM. Ask your carrier about unlocking before you travel.

Next step: Browse your study destination and pick a plan on Destinations. Install at home, land connected, and keep your home number live for OTPs and WhatsApp.