Dual SIM on iPhone with eSIM: Default Line, Data, iMessage/FaceTime

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Dual SIM on iPhone with eSIM: Default ...

Dual SIM on iPhone with eSIM: Default Line, Data, iMessage/FaceTime

31 Oct 2025

Setup
Dual SIM on iPhone with eSIM: Default Line, Data, iMessage/FaceTime

Travel is smoother when your iPhone uses a local data plan while your home number stays reachable. That’s exactly what Dual SIM with eSIM enables. In this guide we’ll show you, step by step, how to add and label lines, choose your default for calls and SMS, set the correct data line, and decide which number powers iMessage and FaceTime. We’ll also cover roaming-safe presets so you land, switch on, and avoid bill shock. Whether you’re heading to the US, Europe or further afield, a few minutes of set-up makes the difference between seamless connectivity and expensive mistakes. If you need an eSIM first, browse country and regional plans on our Destinations page, including regional bundles like Esim Western Europe and Esim North America, or country options such as Esim United States, Esim France, Esim Italy, and Esim Spain.

What “Dual SIM with eSIM” means on iPhone

  • You can have two mobile plans on one iPhone: typically your physical SIM (home number) plus an eSIM (travel data), or two eSIMs on newer models.
  • You choose which line handles voice and SMS by default.
  • You pick a single data line at any time, with optional “Allow Mobile Data Switching” to keep data alive for calls on the other line.
  • iMessage and FaceTime can be tied to either number (or your Apple ID), and you can switch per-contact when needed.

This guide focuses on practical, traveller-first settings to keep your home number reachable while your travel eSIM handles data securely and affordably.

Check your iPhone supports Dual SIM with eSIM

Most recent iPhones support Dual SIM. Quick checkpoints:

  • iPhone XS/XR and later: Dual SIM (one physical SIM + one eSIM).
  • iPhone 13 and later: can support two active eSIMs simultaneously (no physical card required).
  • US-model iPhone 14 and newer: eSIM-only (no physical SIM slot).

To confirm on your device: 1. Go to Settings > General > About. 2. Look for “Digital SIM” or “eSIM” entries. If you see IMEI entries for two eSIMs, your phone supports dual eSIM. 3. Ensure you’re on the latest iOS for best Dual SIM features.

Step 1: Add your travel eSIM and label your lines

Before you fly, install and label your eSIM so switching is painless on arrival.

  1. Purchase the right plan for your trip: - North America: Esim North America - United States: Esim United States - Western Europe: Esim Western Europe - Popular countries: Esim France, Esim Italy, Esim Spain - Explore all options: Destinations
  2. Install the eSIM: - Settings > Mobile Data (Cellular) > Add eSIM. Follow the on‑screen steps to scan your QR code or use the activation code. - If offered, “Convert to eSIM” can move your physical SIM to eSIM on supported devices.
  3. Label each line clearly: - iOS prompts you to label the plans. Choose intuitive labels like “Home” and “Travel”. - You can rename later: Settings > Mobile Data > tap a plan > Label.

Pro tips: - Label accuracy is crucial; it’s how you’ll pick the right line in call/message screens. - Install eSIM while you still have good Wi‑Fi and time to test.

Step 2: Choose your default line for calls and SMS

This controls which number your iPhone uses when you tap a number or send an SMS from scratch.

  1. Go to Settings > Mobile Data > Default Voice Line.
  2. Pick “Home” (your primary) if you want all ordinary calls/SMS to continue from your usual number.
  3. If you prefer to make outbound calls from your travel number (e.g., local business calls abroad), choose “Travel”.

Per-contact preference: - Open the Contacts app > select a contact > tap “Preferred Line” (or “Preferred Cellular Plan”) > choose Home or Travel. - iPhone learns your behaviour and can automatically use the last line you used for that contact.

Pro tip: - Keep Default Voice Line = Home, then set exceptions (like hotels/restaurants) to Travel so you appear local.

Step 3: Set your mobile data line and Roaming

This is the big one for bill safety: make the eSIM your data source and block roaming on your home line.

  1. Settings > Mobile Data > Mobile Data > select “Travel”.
  2. Tap your Home line > toggle Data Roaming OFF.
  3. Tap your Travel line > toggle Data Roaming ON (if you’re abroad) so data works when you land.
  4. Optional: under Mobile Data, enable “Allow Mobile Data Switching”. This lets iPhone temporarily use the data line for ongoing voice calls on the other line. If you want strict control (no surprises), keep this OFF.

When to disable your Home line entirely: - If your carrier charges for incoming roaming calls, you may prefer to disable the Home line: Settings > Mobile Data > tap Home > Turn On This Line = OFF. - If you still need OTP texts or critical calls, leave the Home line ON but keep Data Roaming OFF (you can still receive SMS over the cellular network; check your carrier’s policies for any charges).

Pro tips: - Test data before you fly: switch Mobile Data to Travel, toggle Data Roaming ON, then back to Home until you depart. - If your Travel plan includes Wi‑Fi calling, consider making calls over apps (WhatsApp, FaceTime, Teams) to avoid local call charges.

Step 4: Set iMessage and FaceTime to the right number

You can attach iMessage/FaceTime to your travel number or keep them linked to your home number while using the travel eSIM for data.

iMessage: 1. Settings > Messages > iMessage = ON. 2. Tap Send & Receive. 3. Tick the phone numbers and/or Apple ID you want active. 4. Under “Start New Conversations From”, choose the number you want by default (Home or Travel).

FaceTime: 1. Settings > FaceTime > FaceTime = ON. 2. Tick the addresses/numbers to receive calls at. 3. Set “Caller ID” (or similar option) to the number you want people to see when you call.

Switch the line per conversation: - In Messages, open a conversation > tap the contact name/photo at the top > change the line if the option appears (or start a new message and tap the line label above the keyboard to choose Home/Travel before sending).

Pro tips: - For continuity with family and friends, keep iMessage/FaceTime on your Home number and use the Travel number only for local contacts. - If verification codes arrive via iMessage instead of SMS, they’ll still work over your Travel data because iMessage uses the internet.

Traveller presets: fast, safe switching

iOS doesn’t have one‑tap “profiles”, but you can mimic them with a simple routine.

Before you fly (10‑minute checklist): - Install and label your eSIM: “Travel”. - Settings > Mobile Data: - Mobile Data = Home (for now). - Home line > Data Roaming = OFF. - Travel line > Data Roaming = ON. - Messages > Send & Receive: - Choose “Start New Conversations From” = Home (or Travel if you want a local sender ID). - FaceTime > Caller ID = preferred number. - Save a few key contacts with Preferred Line = Travel (hotel, taxi, local colleagues).

On the plane/at the gate: - Settings > Mobile Data > Mobile Data = Travel. - Optional: Allow Mobile Data Switching = OFF for strict control.

On arrival: - Toggle Airplane Mode OFF; wait 1–2 minutes for the Travel eSIM to register. - Confirm data works (open a lightweight website). - Make a quick test call/iMessage.

During your stay: - Keep Home line ON with Data Roaming OFF to receive SMS when needed. - For local calls, set Preferred Line = Travel per contact or temporarily switch the Default Voice Line.

Heading home: - Switch Mobile Data back to Home. - Turn off the Travel line if you won’t use it until your next trip, or leave it installed for future travel.

Troubleshooting: quick fixes that work

No data on the Travel eSIM: - Check Settings > Mobile Data > Mobile Data = Travel. - Settings > Mobile Data > tap Travel > Data Roaming = ON. - Restart iPhone; toggle Airplane Mode for 10 seconds. - Settings > General > About: if prompted for a Carrier Settings Update, accept. - If your plan requires a specific APN, it should auto‑configure with eSIM; if not provided, contact support.

Calls/SMS using the wrong number: - Settings > Mobile Data > Default Voice Line = intended line. - For specific contacts, set Preferred Line. - In the Messages conversation, change the line before sending.

iMessage/FaceTime not activating: - Ensure you have data on the active line and can receive SMS on at least one line. - Toggle iMessage/FaceTime OFF and back ON. - Sign out/in of Apple ID in Messages/FaceTime settings as a last resort.

Can’t see “Allow Mobile Data Switching”: - It shows only when both lines are active and one is selected for Mobile Data.

Missing the option to assign “Preferred Line”: - Make sure both lines are turned ON (Settings > Mobile Data > tap each plan).

Picking the right eSIM for your route

For teams and frequent travellers: - Centralise budgets and provisioning via For Business. - Travel agencies, IT resellers and affiliates can explore our partner tools at the Partner Hub.

Pro tips for power users

  • Dual SIM iPhone eSIM pairing: on iPhone 13 and newer, you can keep two eSIMs active—useful if your “home” number is also an eSIM.
  • Visual labelling: add emojis to line labels (e.g., “Home 🏠”, “Travel ✈️”) to avoid mistakes when switching lines in Messages or Phone.
  • Battery and coverage: if coverage is weak on one line, disabling that line can improve standby time.
  • Maps and ride‑hailing: test these apps on the Travel data line before leaving the airport to confirm routing and SMS verification work.
  • Keep it simple: Default Voice Line = Home, Mobile Data = Travel is the safest starting point for most travellers.

FAQ

1) Can I keep my home SIM for calls/SMS but use the eSIM for data? - Yes. Set Default Voice Line = Home. Set Mobile Data = Travel. Turn Data Roaming OFF on Home. You can still receive SMS on Home while using data on Travel.

2) Will I get roaming charges on my home line if it’s on? - Data roaming is prevented if you turn Data Roaming OFF on the Home line. Voice/SMS charges depend on your carrier and whether you answer/receive calls or send texts while abroad. For maximum control, you can turn the Home line OFF entirely.

3) Can iMessage/FaceTime use my home number while data comes from the Travel eSIM? - Yes. iMessage/FaceTime work over the active data connection, regardless of which number you choose in Send & Receive/Caller ID. Pick “Start New Conversations From” = Home to keep continuity.

4) How do I switch the sending line in a specific message thread? - Open the conversation, tap the header (contact name/photo), and choose the line, or start a new message, then tap the line label above the keyboard to switch before sending.

5) Why don’t I see both lines at once? - Ensure your iPhone supports Dual SIM and both lines are turned ON: Settings > Mobile Data > tap each plan > Turn On This Line. Older models may support only one eSIM plus one physical SIM, while newer models support two eSIMs.

6) Can I keep two eSIMs active, no physical SIM? - On iPhone 13 and newer, yes—two active eSIMs are supported. US-model iPhone 14+ are eSIM-only devices and handle multiple eSIMs easily.

Next step: Choose the right travel plan for your route on Destinations, then follow the steps above to set Mobile Data = Travel and Default Voice Line = Home before you fly.

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Andes Highlights (3 Weeks): Peru–Bolivia–Chile–Argentina Connectivity

Andes Highlights (3 Weeks): Peru–Bolivia–Chile–Argentina Connectivity

Planning a south america itinerary 3 weeks through the high Andes? This route stitches together Peru’s Sacred Valley, Bolivia’s La Paz and Salar de Uyuni, Chile’s Atacama Desert, and northern Argentina’s quebradas or Mendoza wine country—often by long-distance bus and a couple of short flights. Connectivity is different at altitude: coverage is strong in cities but drops in high passes and salt flats; bus Wi‑Fi is patchy; border towns can be blackspots. The smart move is an eSIM with multi‑country coverage, backed by offline maps, offline translations, and a simple routine for crossing borders by bus without losing service. Below you’ll find a practical, connectivity-first itinerary; checklists to prep your phone, apps and documents; and on-the-ground tips for staying online where it matters: booking transport, hailing taxis, backing up photos, and navigating when the signal disappears.If you’re transiting via Europe or North America, you can also add a layover eSIM to stay connected door-to-door. Start with our country list on Destinations, then follow the steps, and you won’t waste time chasing SIM shops at 3,500 metres.The 3‑week Andes route at a glanceWeek 1: Peru (Cusco, Sacred Valley, Machu Picchu) - Fly into Cusco (or Lima then connect). - Base in Cusco; day trips to Pisac/Chinchero/Maras–Moray. - Train to Aguas Calientes; Machu Picchu visit; return to Cusco or continue to Puno/Lake Titicaca.Week 2: Bolivia and Chile (La Paz, Uyuni, San Pedro de Atacama) - Bus/collectivo via Copacabana to La Paz. - Fly or overnight bus to Uyuni. - 3‑day Uyuni–altiplano tour ending in San Pedro de Atacama (Chile).Week 3: Chile and Argentina (Atacama to Salta or Mendoza/Buenos Aires) - Choose: - North: San Pedro to Salta/Jujuy by bus; fly to Buenos Aires. - Or South: San Pedro–Calama flight to Santiago; bus or flight to Mendoza; onward to Buenos Aires.Connectivity notes (quick): - Cities: generally strong 4G/4G+; 5G in major hubs (Santiago, Buenos Aires). - Altitude/rural: expect long no‑signal stretches (Uyuni, altiplano passes, Paso Jama). - Bus Wi‑Fi: often advertised, rarely reliable. Plan to be offline onboard. - Border regions: networks switch; a multi‑country eSIM avoids sudden loss.eSIM vs local SIMs for a 4‑country tripFor a route with multiple borders and remote legs, eSIM wins on time and reliability.What a multi‑country eSIM gets you: - One plan across Peru, Bolivia, Chile, Argentina (check coverage per country on Destinations). - No passport/SIM registration queues at kiosks. - Keep your home number active on the physical SIM for calls/SMS codes. - Instant top‑ups if you burn data on photos or navigation.When a local SIM still helps: - Long stay in one country with heavy data use (e.g., a month in Buenos Aires). - Dead zones where a different local network performs better (rarely worth the hassle on a 3‑week pace).Practical approach: - Use an eSIM as your primary data line across all four countries. - If you find a specific local network far better in one region, add a cheap local SIM and keep the eSIM as backup.Device readiness checklist (before you fly)1) Check eSIM compatibility and SIM‑lock status on your phone.2) Buy and install your eSIM while on home Wi‑Fi. Keep a PDF/printed copy of the QR code.3) Label lines clearly (e.g., “eSIM Andes Data”, “Home SIM”).4) Turn on data roaming for the eSIM; leave roaming off for your home SIM to avoid charges.5) Set up dual‑SIM rules: data on eSIM; calls/SMS default to home SIM if needed.6) Download offline: Google Maps/Organic Maps for all target regions; language packs (Spanish at minimum); bus/air tickets; hotel confirmations.7) Cloud backups: set to upload on Wi‑Fi only; pre‑create shared albums for travel companions.8) Test tethering/hotspot with your laptop/tablet.If you’re transiting popular hubs, consider a short layover eSIM: - USA connections: add an Esim United States or a broader Esim North America.- Europe connections: Madrid/Barcelona? Use an Esim Spain. Paris or Rome? See Esim France and Esim Italy. Multi‑country layovers? Try Esim Western Europe.City‑by‑city connectivity notesCusco & the Sacred Valley (Peru)Coverage: Good in Cusco city; variable in high villages (Maras/Moray) and along Inca Trail approaches.Tips: Download Sacred Valley maps offline; pin viewpoints and ruins. most taxis use WhatsApp—save your accommodation’s number.Machu Picchu/Aguas Calientes: Patchy to none at the citadel. Upload your photos later; don’t rely on live ticket retrieval.Lake Titicaca: Puno and CopacabanaPuno: Reasonable 4G; bus terminals crowded—screenshot QR tickets.Crossing to Copacabana: Expect a signal drop around the border; have directions saved offline.La Paz (Bolivia)Good urban 4G; the cable car network has decent signal but tunnels do not.Yungas/“Death Road” tours: Mountain valleys cause dead zones—share your emergency contacts with the operator, carry a charged power bank, and don’t plan remote calls.Uyuni and the Altiplano (Bolivia to Chile)Uyuni town: OK 4G; ATMs finicky—use Wi‑Fi for banking apps.Salt flats/lagunas: Assume offline for most of the 3‑day tour. Guides often carry satellite phones; agree a pickup time/place in San Pedro and preload your map route.San Pedro de Atacama (Chile)Town: Solid 4G; accommodations often have Wi‑Fi but speeds vary.Geysers, Valle de la Luna: Offline navigation essential; sunrise trips start before mobile networks wake up in some areas.Salta/Jujuy or Mendoza/Buenos Aires (Argentina)Salta/Jujuy: Good city coverage; quebradas have long no‑signal sections.Mendoza: City 4G/5G; vineyards outside town can be patchy.Buenos Aires: Strong 4G/5G; ideal for cloud backups and large downloads before you fly home.Border crossings by bus: step‑by‑stepThe big ones on this route: Peru–Bolivia (Puno/Copacabana), Bolivia–Chile (Uyuni–San Pedro via Hito Cajón), Chile–Argentina (Paso Jama to Salta or Los Libertadores to Mendoza).How to keep service and sanity:1) The day before:- Top up your eSIM data.- Confirm your plan includes both countries you’re entering/leaving.- Download offline maps for both sides of the border and your town of arrival.- Save bus company WhatsApp and terminal address offline.2) On departure morning:- Keep a paper copy or offline PDF of tickets, insurance, and accommodation proof.- Charge phone and power bank; pack a short cable in your daypack.3) On the bus:- Don’t count on bus Wi‑Fi. Keep your eSIM as primary, but expect drops near mountain passes.- If your phone supports it, enable “Wi‑Fi calling” for later when you reach accommodation Wi‑Fi.4) At the border posts:- Data may be unavailable. Keep QR codes and booking numbers offline.- After exiting one country and entering the next, toggle Airplane Mode off/on to re‑register on the new network.- If the eSIM doesn’t attach, manually select a network in Mobile Settings.5) Arrival:- Send your accommodation a quick WhatsApp when you’re back online.- Recheck your eSIM’s data roaming is on; confirm you’re on an in‑country network, not a weak roaming partner.Pro tips: - Dual profiles: If your eSIM allows, keep a secondary profile for a different network in the same country—helpful in border towns.- Cash buffer: Some border terminals don’t accept cards; download a currency converter for offline use.Offline survival kit (5‑minute setup)Maps: Download regions for Cusco, Sacred Valley, Puno, La Paz, Uyuni, San Pedro, Salta/Jujuy or Mendoza, and Buenos Aires.Translations: Download Spanish for offline use; add phrasebook favourites (bus tickets, directions, dietary needs).Documents: Save PDFs of passports, tickets, hotel addresses; star them for quick access.Rides: Screenshots of pickup points; pin bus terminals and hotel doors.Entertainment: Podcasts and playlists for long bus legs, set to download on Wi‑Fi only.Altitude and your tech: what changesCoverage gaps lengthen: Fewer towers at high altitude; valleys can block signal. Assume offline on remote excursions.Batteries drain faster in cold: Keep your phone warm and carry a power bank (10,000–20,000 mAh).Hotel Wi‑Fi may be congested: Schedule big uploads (photo backups, app updates) for big-city stays like Santiago or Buenos Aires.GPS still works offline: Your blue dot shows on offline maps without data—preload everything.Data budgeting for 3 weeksTypical traveller usage across this route: - Messaging/Maps/Bookings: 0.2–0.5 GB/day- Social and photo sharing: 0.3–0.7 GB/day- Occasional video calls/streaming: 0.5–1.0 GB/dayFor a mixed-use trip, plan 15–25 GB for 3 weeks. Heavy creators should double it and upload over hotel Wi‑Fi when possible. If you work remotely, consider a higher‑capacity plan and a backup eSIM; see our guidance on For Business.Practical route with transport and connectivity cuesDays 1–4 Cusco base: Strong city signal; day trips may be spotty—go offline-ready.Days 5–6 Machu Picchu: Expect no service at the ruins; sync tickets ahead.Days 7–8 Puno to La Paz via Copacabana: Border signal drop; re‑register networks after crossing.Days 9–11 Uyuni tour to San Pedro: Treat as offline; charge nightly; carry spare cables.Days 12–14 San Pedro: Stable in town; tours offline; top up data before Paso Jama.Days 15–17 Salta/Jujuy or Mendoza: Good urban 4G; rural patches are offline.Days 18–21 Buenos Aires: Strongest connectivity of the trip; clear your uploads and map downloads for the flight home.Partnering and stopover extrasHospitality and tour operators in the Andes: help your guests stay connected—explore co‑branded solutions via our Partner Hub.Transatlantic flyers: test your eSIM setup on a layover with an Esim United States or Esim Western Europe before hitting high-altitude blackspots.FAQs1) Do I need a local SIM in each country?No. A multi‑country eSIM covering Peru, Bolivia, Chile and Argentina is simpler and works well for a 3‑week pace. Consider a local SIM only if you’ll spend longer in one country and want the absolute best regional coverage.2) Will my WhatsApp number change with an eSIM?No. WhatsApp is tied to your registered number, not your data line. Keep your home SIM active for voice/SMS (roaming off if you wish), and use the eSIM for data—WhatsApp continues as normal.3) Can I hotspot to my laptop or camera?Yes. Enable tethering on your eSIM. Mind your data: cloud backups and OS updates can burn gigabytes—set them to Wi‑Fi only or schedule in big cities.4) What if there’s no signal on the Uyuni/Atacama legs?That’s expected. GPS still works offline. Pre-download maps and translations, carry a power bank, and sync plans with your tour operator before departure.5) Will I get roaming charges at borders?If you’re using a multi‑country eSIM with coverage in both countries, you won’t incur extra roaming fees from your home carrier. Keep roaming off on your home SIM to avoid accidental use.6) I’m connecting via Europe or the US—worth getting a layover eSIM?Yes. It’s an easy way to test your setup and stay reachable. Try Esim North America or country options like Esim Spain, Esim France, or Esim Italy for common hubs.Next step: Browse South America coverage options and build your plan on Destinations.

31 Oct 2025
Singapore eSIM & Mobile Internet Guide (2025): Best Plans & Typical Speeds

Singapore eSIM & Mobile Internet Guide (2025): Best Plans & Typical Speeds

Staying connected in Singapore is easy, fast and affordable. Mobile coverage is near-universal, 5G is mature across the island, and even underground MRT tunnels have service. For most travellers, an eSIM is the simplest way to land at Changi, scan a QR code, and be online before your bags reach the carousel. This guide covers the best-value plan types, how to set up at Changi, what speeds to expect in the CBD vs. the MRT, and practical tips to avoid bill shock. If you’re bouncing on to other countries, we also note multi-country options and what to consider when picking a plan. Expect straight answers, realistic speed benchmarks, and checklists you can use on the move. When you’re ready, choose your Singapore eSIM from our country pages via Destinations.Quick take: Is an eSIM the best way to get data in Singapore?Yes for most travellers. You can install before you fly, activate on arrival, and avoid queuing for a physical SIM.Coverage and speeds are excellent on all major networks (Singtel, StarHub, M1).Tourist-friendly plans offer big data (50–150 GB) for a low fixed cost.eSIMs are ideal if you want to keep your home SIM active for calls/2FA.Physical SIMs from telco shops work too, but eSIM saves time at Changi and lets you manage everything in-app.Networks and coverage: how good is mobile data in Singapore?The big three and where they shineSingtel: Broadest coverage, especially strong indoors and at busy venues.StarHub: Competitive 5G in central areas and good value.M1: Reliable island-wide performance; solid on MRT corridors.SIMBA (formerly TPG): Budget-friendly; improving footprint, but not every plan roams or supports all 5G bands.All three major networks cover the CBD, Orchard, Sentosa, Marina Bay, HDB towns and business parks well. You’ll get usable data in malls, hawker centres, museums and most high-rise buildings.MRT coverage (including tunnels)Expect continuous 4G/5G on most lines, including underground sections.Short drops can occur during cell handovers between stations or in packed peak-hour trains.On above-ground stretches, speeds jump; in deep tunnels they dip but remain usable for maps/messaging.Pro tip: If a live stream stutters in a tunnel, switch to audio-only or download your playlist before boarding.Changi AirportCoverage is excellent across all terminals. Free airport Wi‑Fi is reliable enough for an eSIM install, but mobile data is typically faster once activated. You can complete eSIM setup before immigration.Typical speeds you can expect (2025 benchmarks)Real-world traveller speeds vary by device, plan and crowding. These are typical ranges:5G in CBD/Marina Bay: 250–600 Mbps down, 20–60 Mbps up; latency 15–25 ms4G in city areas: 40–120 Mbps down, 10–40 Mbps up; latency 25–40 msMRT (tunnels/underground platforms): 5–50 Mbps down; enough for maps, messages, emailChangi Airport: 100–400 Mbps on 5G in open areasHotels/convention centres: 20–150 Mbps; dense concrete can slow indoor speedsPro tip: Many “tourist” eSIMs now include 5G. If your plan is 4G-only, you’ll still get excellent performance for maps, ride-hailing and HD video.Best eSIM plan types for Singapore travellers (2025)You’ll find two main categories:1) Big-bundle tourist data packs- 50–150 GB for 7–15 days, often including local minutes and some regional roaming.- Typical price: SGD 10–25 for 7–12 days; SGD 20–35 for 12–20 days.- Good for: short trips, heavy data use (video, hotspot), no top-ups.2) Flexible pay-by-size data eSIMs- 3–20 GB with 7–30 day validity; easy to top up in-app.- Typical price: SGD 6–18 depending on data and validity.- Good for: light users, longer stays needing predictable costs and easy extensions.What about multi-country? If Singapore is one stop on a wider itinerary, consider a regional plan to avoid swapping eSIMs as you move. For example: - US legs: Esim United States or broader Esim North America- Europe trips: country options like Esim France, Esim Italy, Esim Spain, or a bundle like Esim Western EuropeWhat to look for in a Singapore eSIMNetwork access: Which carrier(s) does it use (Singtel/StarHub/M1) and is 5G included?Hotspot/tethering: Allowed on most plans; double‑check if you plan to work on a laptop.Voice/SMS: Many tourist packs include local minutes; data‑only is fine for app calls.Activation window: Some QR codes must be installed within a set timeframe (often 30 days).Validity vs. travel dates: Pick a plan that covers your full stay; top‑up if you might extend.Fair use: Unlimited plans may throttle after a daily cap; read the fine print.Step-by-step: set up your eSIM at Changi (5 minutes)1) Before you fly- Purchase your eSIM and download the QR/code from your email or app.- On iPhone: Settings > Mobile Service > Add eSIM. On Android: Settings > Network & Internet > SIMs > Download a SIM.2) On landing- Connect to “Changi Wi‑Fi” or another free network to avoid using roaming data.- Open your QR or follow the in-app install flow.3) Install the eSIM- Scan the QR or paste the activation code when prompted.- Label it “Singapore” for clarity if you’re dual-SIM.4) Set line preferences- Set the eSIM as “Mobile Data.” Keep your home SIM for calls/WhatsApp if needed.- Turn “Data Roaming” ON for the eSIM line.5) APN check- Most plans auto‑configure. If not, enter the APN from your eSIM instructions.6) Force a network- If you don’t get data within 60 seconds, toggle airplane mode or manually select Singtel/StarHub/M1.7) Test it- Load a map, hail a ride, or run a quick speed test.- Enable hotspot if you plan to tether.8) Keep the QR handy- Some devices let you re‑download the eSIM if you switch phones. Save your credentials.Pro tip: Install the eSIM the day before travel (but don’t activate data) to avoid airport faff. Many plans only start the validity clock when they first connect to Singapore’s network.Troubleshooting checklist (2 minutes)No data? Confirm “Mobile Data” is set to the eSIM line and “Data Roaming” is ON.Stuck on 3G/4G? Toggle 5G in settings, or reselect the carrier manually.Slow on the MRT? Wait until the next station or above-ground section.APN mismatch? Re-enter the APN exactly as provided.Dual-SIM conflicts? Temporarily disable the home SIM’s data.Still stuck? Reboot. If unresolved, contact support via your eSIM app.Costs: eSIM vs. physical SIM vs. roamingeSIM: SGD 6–35 for most short trips, depending on data size and 5G access. Great value with zero queue time.Physical SIM: Similar pricing, but require shop visits and passport registration; eSIM avoids the counter stop.Roaming on your home plan: Often SGD 8–20 per day with limited data; adds up fast on week‑long trips.Pro tip: Heavy users (hotspotting a laptop, 4K streaming) should pick a 100–150 GB pack; it’s still cheaper than daily roaming.Practical data-saving tips in SingaporeDownload offline maps for Singapore and MRT lines in Google Maps/Citymapper.Use Wireless@SGx where available (malls, cafes); expect 5–20 Mbps.Set streaming to “Auto” or 720p on mobile.Disable background iCloud/Google Photos upload until on hotel Wi‑Fi.Cache playlists/podcasts on hotel Wi‑Fi before commute hours.Use Lite modes in social apps if you’re on a small data bundle.Business travel, teams and partnersCoordinating a team event or exhibition at Marina Bay Sands or Expo? We can pre-provision eSIMs and centralise billing. See For Business.Travel agencies, TMCs or resellers can access tools, collateral and tiered pricing in our Partner Hub.Multi-country itineraries that include SingaporeIf you’re transiting Singapore en route to other regions, a regional plan can simplify things: - US only or Hawaii extensions: Esim United States- Canada/US/Mexico coverage: Esim North America- European city-hopping: Esim Western Europe or country picks like Esim France, Esim Italy and Esim SpainFAQWill my phone support an eSIM in Singapore?Most recent iPhones (XS and newer), Google Pixels (3 and newer) and flagship Samsung models support eSIM. Check your device’s eSIM status in Settings before you buy.Do I need to show ID to use an eSIM?Local physical SIMs typically require passport registration at point of sale. Many travel eSIMs complete any necessary registration in-app during purchase—have your passport handy just in case.Can I keep my home number active for calls and OTPs?Yes. Set your home line to “Calls & SMS” and your eSIM to “Mobile Data.” This way, you receive bank codes and still use low-cost local data.Will I get 5G on a tourist eSIM?Increasingly, yes—many plans include 5G on Singtel, StarHub or M1. Some budget plans are 4G-only. Check the plan details; 4G performance in Singapore is already strong for everyday use.Is hotspotting allowed?Usually. Most Singapore-focused travel eSIMs permit tethering, but a few limit it or throttle after heavy use. If you need to work on the go, choose a plan that explicitly supports hotspots.How much data do I need for a 3–7 day trip?Light use (maps, rides, messaging): 3–5 GB.Typical tourist use (social, HD video, photos): 8–15 GB.Heavy use (hotspot/laptop, streaming): 20–50 GB. When in doubt, pick a larger bundle—per‑GB costs drop on bigger packs.Next stepReady to get connected? Head to Destinations, pick Singapore, and choose the eSIM that matches your trip length and data needs.

30 Oct 2025
Istanbul Speed Test: IST Airport, Sultanahmet, Kadıköy (Asian Side)

Istanbul Speed Test: IST Airport, Sultanahmet, Kadıköy (Asian Side)

Istanbul is a sprawling city split by the Bosphorus, with travellers hopping between the European and Asian sides by metro, tram, and ferry. We ran a focused istanbul mobile speed test to benchmark real-world performance where visitors actually need it: IST Airport (arrivals and airside), old-town Sultanahmet (for landmarks and hotels), Kadıköy (Asian-side hub), and on ferries linking both shores. We measured download/upload throughput, latency, and reliability on Turkcell, Vodafone Turkey, and Türk Telekom, using both local prepaid SIMs and roaming eSIM profiles. This report highlights exactly what to expect—and how to optimise your connection—whether you’re pushing files, running video calls, or just getting around. Our dataset is open in CSV below so you can slice by location, operator, and scenario. If you’re planning a wider trip around Europe or North America, we’ve also linked relevant eSIM options to keep you connected end-to-end.Schema hint: Dataset/TechArticleHow we testedDates and times: Weekday and weekend sessions across two days, daytime (09:30–17:30) and early evening (18:00–20:00).Locations: IST (airside gates, arrivals, M11 metro platform), Sultanahmet (Hagia Sophia square, T1 tram, indoor café), Kadıköy (pier, Moda Park, indoor retail), plus ferries (Eminönü–Kadıköy and Karaköy–Kadıköy routes).Networks: Turkcell, Vodafone TR, Türk Telekom. Roaming profiles connected to local networks per partner agreements.Devices: Two recent 5G-capable handsets, both set to LTE/4.5G preferred (Turkey’s public 5G is limited to pilots; most service is LTE-Advanced).Tools: Multiple runs via Speedtest, nPerf, and Fast.com; we report medians per spot to reduce outlier bias.Controls: Airplane-mode cycles between operators, manual network selection when needed, and consistent test file sizes. Signal metrics noted where available.Note on 5G: Consumer 5G is not broadly live citywide; most sessions used LTE-A (“4.5G”) with carrier aggregation. Treat any “5G” icon appearances as trial coverage, not baseline.Results at a glance: European vs Asian sideCoverage: All three operators cover tourist corridors well. Turkcell was the most consistent overall, especially in transit (ferries, metro access points). Vodafone TR was close behind. Türk Telekom had more variability indoors and mid-channel on ferries.Throughput:European side (Sultanahmet): Solid outdoors, moderate indoors. Typical outdoor medians 45–80 Mbps down. Indoors could drop to 10–30 Mbps.Asian side (Kadıköy): Generally faster outdoors. Typical medians 70–110 Mbps down in open areas like the pier and Moda.IST Airport: Variable; strong airside, congested arrivals at peak.Latency: 22–40 ms on land with local SIM; roaming eSIM often added 10–20 ms. On ferries, latency spikes above 80–120 ms mid-channel were common.Roaming vs local: Roaming eSIMs that attach to Vodafone TR or Turkcell performed well but were typically 10–25% slower than local SIMs at peak load, with slightly higher ping.Reliability: Brief handover stalls (2–10 seconds) occurred on ferries and when trams entered cuttings or underpasses. Web and messaging usually masked them; live calls could stutter.For broader planning, browse country-level guides in Destinations, and if you’re continuing beyond Turkey, see regional options like Esim Western Europe or Esim North America.Location-by-location findingsIST Airport (IST)Airside gate area (midday):Turkcell: ~110/35 Mbps, 23 msVodafone TR: ~75/25 Mbps, 28 msTürk Telekom: ~40/15 Mbps, 35 msNote: Congestion fluctuates with banked departures. Airside consistently outperforms landside.Arrivals hall (early afternoon peak):Turkcell: ~55/22 Mbps, 31 msVodafone TR: ~38/14 Mbps, 36 msTürk Telekom: ~20/10 Mbps, 42 msTip: Step a few metres from the baggage belts to reduce interference; speeds jump noticeably near exits.M11 Metro platform:Turkcell: ~25/10 Mbps, 45 msVodafone TR: ~15/6 Mbps, 58 msTürk Telekom: ~8/4 Mbps, 70 msExpect quick drops as trains enter tunnels; buffered music/maps are fine, live video is hit-and-miss.Wi‑Fi at IST is available but time-limited and device-code heavy; mobile often wins for reliability. If you’re landing from the US or EU, set roaming before touchdown. Travellers coming from the US can pre-plan with Esim United States, and Europe-bound flyers can compare Esim France, Esim Italy, and Esim Spain for onward legs.Sultanahmet (European side)Hagia Sophia square (outdoors):Turkcell: ~85/30 Mbps, 24 msVodafone TR: ~60/22 Mbps, 28 msTürk Telekom: ~35/12 Mbps, 34 msConsistent even with heavy footfall; early mornings are fastest.T1 tram (Sultanahmet–Gülhane–Sirkeci):Mixed 10–25 Mbps; occasional handover pauses around underpasses and dense building canyons.Latency fluctuations to 80–100 ms during movement.Indoors (stone-walled café):12–30 Mbps down depending on operator and position.Move closer to windows for a 2–3× improvement.Sultanahmet is fine for navigation, browsing, and HD streaming outside. For uploads (stories, reels), step outdoors or by a window for best results.Kadıköy (Asian side)Kadıköy Pier:Turkcell: ~95/35 Mbps, 22 msVodafone TR: ~70/28 Mbps, 26 msTürk Telekom: ~50/18 Mbps, 31 msModa Park (open space):Turkcell: ~120/40 Mbps, 21 msVodafone TR: ~85/30 Mbps, 25 msTürk Telekom: ~60/20 Mbps, 29 msIndoor retail (basement/partial):Turkcell: ~18/8 MbpsVodafone TR: ~14/6 MbpsTürk Telekom: ~10/4 MbpsThe Asian side generally delivered higher outdoor medians and smoother app performance, especially for upstream tasks like cloud backups and posting video.Ferries: Eminönü–Kadıköy and Karaköy–KadıköyNear shores (first/last 2–3 minutes): 40–90 Mbps typical, low latency.Mid-channel: 5–15 Mbps down, 1–5 Mbps up, latency spikes 90–140 ms, occasional 2–10 second stalls during cell handoffs.Operator stability ranking (this route set): Turkcell most consistent, then Vodafone TR, then Türk Telekom (more frequent dips to 3G or single-carrier LTE).Roaming eSIMs worked well but mirrored the 10–25% throughput penalty seen on land.If you depend on real-time calls, avoid starting them mid-crossing. Preload maps/music and queue cloud uploads for when you’re near shore.Practical steps to get the best speedsQuick setup checklist on arrivalDisable Low Data/Battery Saver modes (they throttle background networking).Set Network Mode to LTE/4G (5G auto is fine, but LTE is your workhorse here).Enable Data Roaming if using an eSIM profile.Allow 2–3 minutes after landing for the roaming profile to settle and pick optimal bands.Toggle airplane mode once if speeds seem stuck below 5 Mbps.Prefer Turkcell where you need the strongest coverage in motion (ferry/tram).For multi-country itineraries, compare regional eSIMs: Esim Western Europe for EU segments and Esim North America if your trip spans the Atlantic. See more countries in Destinations.On ferries: minimise dropoutsStart uploads before departure; pause sync mid-crossing.Keep SIM/eSIM on automatic network selection; manual locks can worsen handovers.If a live call is essential, sit near windows/upper deck and start near the pier.Accept brief stalls; most apps recover if you don’t aggressively retry.For video calls in the cityTarget 5–10 Mbps up, <60 ms latency. In Sultanahmet, take calls outdoors or near windows. In Kadıköy parks and waterfronts, you’ll usually hit these targets easily.Disable HD video if jitter rises; audio-first is very stable across both sides.For teams and heavy travellersCarry two profiles (e.g., Turkcell + Vodafone TR or a roaming eSIM plus a local) for failover.Use a travel router with SIM slot for shared work sessions.Business fleets can standardise on profiles and policies through For Business. Integrations and bulk support partners: see Partner Hub.Open dataset (CSV)Header: timestamp_iso,area,spot,operator,access_tech,down_mbps,up_mbps,ping_ms,jitter_ms,packet_loss,notes2025-05-12T10:05:00Z,IST,Airside Gate B,Turkcell,LTE-A,112,36,23,5,0,Busy gate bank2025-05-12T10:10:00Z,IST,Airside Gate B,Vodafone TR,LTE-A,74,25,28,7,0,Consistent2025-05-12T10:14:00Z,IST,Airside Gate B,Türk Telekom,LTE-A,41,15,35,9,0,—2025-05-12T13:20:00Z,IST,Arrivals Hall,Turkcell,LTE-A,56,22,31,11,0.1,Crowded belts2025-05-12T13:25:00Z,IST,Arrivals Hall,Vodafone TR,LTE-A,38,14,36,12,0.2,Peak hour2025-05-12T13:29:00Z,IST,Arrivals Hall,Türk Telekom,LTE-A,20,10,42,15,0.4,Peak hour2025-05-12T15:40:00Z,Sultanahmet,Hagia Sophia Sq,Turkcell,LTE-A,86,30,24,6,0,Outdoor2025-05-12T15:43:00Z,Sultanahmet,Hagia Sophia Sq,Vodafone TR,LTE-A,61,22,28,7,0,Outdoor2025-05-12T15:46:00Z,Sultanahmet,Hagia Sophia Sq,Türk Telekom,LTE-A,36,12,34,8,0.1,Outdoor2025-05-12T16:10:00Z,Sultanahmet,T1 Tram,Vodafone TR,LTE-A,18,7,82,22,0.5,In motion2025-05-12T16:13:00Z,Sultanahmet,T1 Tram,Turkcell,LTE-A,24,9,77,18,0.3,In motion2025-05-12T16:30:00Z,Sultanahmet,Indoor Café,Turkcell,LTE-A,28,10,33,10,0.1,By window2025-05-12T18:05:00Z,Kadıköy,Pier,Turkcell,LTE-A,96,35,22,5,0,Outdoor2025-05-12T18:08:00Z,Kadıköy,Pier,Vodafone TR,LTE-A,71,28,26,6,0,Outdoor2025-05-12T18:12:00Z,Kadıköy, Moda Park,Turkcell,LTE-A,121,41,21,5,0,Open park2025-05-12T18:15:00Z,Kadıköy, Moda Park,Vodafone TR,LTE-A,86,30,25,6,0,Open park2025-05-12T18:20:00Z,Kadıköy,Indoor Retail,Türk Telekom,LTE,10,4,39,12,0.2,Basement2025-05-12T19:00:00Z,Ferry,Eminönü–Kadıköy Mid,Turkcell,LTE-A,12,4,98,24,0.8,Mid-channel2025-05-12T19:02:00Z,Ferry,Eminönü–Kadıköy Mid,Vodafone TR,LTE-A,9,3,112,27,1.1,Mid-channel2025-05-12T19:04:00Z,Ferry,Eminönü–Kadıköy Near Shore,Turkcell,LTE-A,58,18,34,9,0.1,Approaching pierUse or adapt this CSV as needed. Median values are more reliable than single-run peaks.Operator notesTurkcell: Best all-rounder for mobility. Strong ferry/metro resilience, highest outdoor medians across our spots.Vodafone TR: Very close to Turkcell, especially in city plazas and Kadıköy; minor dips during motion.Türk Telekom: Perfectly usable for navigation and messaging; larger performance variance indoors and mid-channel.Roaming profiles that land on Turkcell or Vodafone generally mirror those operators’ strengths, with a modest throughput/ping penalty typical of roaming.Pro tipsDownload offline maps before boarding ferries or the M11 metro.In old-stone buildings, move to windows or doorways for 2×–3× better speeds.Schedule big uploads for Kadıköy waterfront or open plazas.If a test shows <5 Mbps, toggle airplane mode and re-run; don’t chase transient blips.Keep expectations: Istanbul’s “4.5G” is fast, but you’ll see brief handover stalls in motion.FAQWhich operator is best in Istanbul for travellers? Turkcell had the most consistent results across airport, historic centre, ferries, and Kadıköy. Vodafone TR was a close second. Türk Telekom worked but was more variable.Is there true 5G in Istanbul? Public, citywide 5G is limited. Most service is LTE-Advanced (often branded “4.5G”). Treat any 5G icons as trial pockets, not day-to-day coverage.Will my EU eSIM work in Turkey? Many EU-focused eSIMs include Turkey through partners. Expect slightly lower throughput and higher latency than local SIMs. For multi-country EU trips, compare Esim Western Europe; for specific onward legs see Esim France, Esim Italy, and Esim Spain.I’m coming from the US/Canada—anything special? Enable roaming before landing and allow the profile to settle post‑touchdown. If your trip continues stateside, review Esim United States and broader Esim North America.Are ferries usable for video calls? Possible near shore, but expect mid-channel stutters. Audio-only is more reliable. Start or resume calls a minute after departure or just before docking.Is airport Wi‑Fi better than mobile data at IST? Not consistently. Mobile data (especially Turkcell/Vodafone TR) outperformed free Wi‑Fi in latency and stability during our sessions, particularly airside.Next step: Planning connectivity beyond Istanbul? Explore country and regional options in Destinations, or talk scale and support with our team via For Business.

30 Oct 2025