Messaging Abroad: WhatsApp, iMessage, Signal — Settings to Check Before You Fly

30 Oct 2025

Travelling with your favourite messaging apps should be simple, but a few unchecked settings can trigger activation texts, runaway photo sync, or costly roaming. This guide focuses on the practical tweaks to make before you go — especially the whatsapp while traveling settings most people miss — so WhatsApp, iMessage and Signal keep working, use less data, and stay secure. We’ll cover line selection on dual‑SIM phones, verification safety (so you don’t get locked out), media auto‑download controls, roaming costs, and backup encryption.

If you plan to use mobile data abroad, consider a local or regional eSIM rather than roaming your home plan. It’s typically cheaper and more predictable. Simology’s coverage spans popular regions including Esim United States, Esim France, Esim Italy, Esim Spain, and broader options like Esim Western Europe and Esim North America. Check what’s available for your trip via Destinations.

Before you go: set up lines, data and roaming

Get your phone’s dual‑SIM and data behaviours right first. It prevents most bill shock and activation hassles.

1) Pick your travel data plan

Prefer a local/regional eSIM to roaming your home SIM for data. It’s usually cheaper, especially for media‑heavy apps.
Browse regional options via Destinations (e.g., Esim Western Europe for multi‑country trips, or Esim North America).

2) Choose the right line for mobile data

iPhone: Settings > Mobile Data
Default line: set your travel eSIM as “Mobile Data”.
Data Roaming: ON for the travel eSIM; OFF for your home SIM.
Allow Mobile Data Switching: OFF to stop your iPhone quietly using the home line’s data when signal is weak.
Android (varies by device):
SIM Manager/Network & Internet > SIMs > Preferred SIM for Mobile Data: choose your travel eSIM.
Disable Data Roaming on the home SIM.
Disable “Switch to mobile data/Adaptive Connectivity/Smart network switch” if it can override Wi‑Fi to mobile.

Pro tip: Turning off Wi‑Fi Assist (iOS: Settings > Mobile Data > Wi‑Fi Assist OFF) prevents surprise cellular data when hotel Wi‑Fi dips.

3) Keep your home number reachable (but not roaming data)

Leave your home SIM active for calls/SMS (bank codes, callbacks), but with Data Roaming OFF.
Turn on Wi‑Fi Calling (if supported) to receive calls/SMS over Wi‑Fi at lower cost.

4) Verify logins and add app‑level protection

Ensure you’re logged into WhatsApp/Signal/Apple ID on Wi‑Fi at home.
Enable app‑level two‑step verification where available (WhatsApp, Signal) and Apple ID two‑factor authentication.
Note: iMessage/FaceTime may send a one‑time activation SMS per line; see iMessage tips below to avoid activating your travel number.

WhatsApp: essential “whatsapp while traveling settings”

WhatsApp is number‑based and famously sticky with media. These settings keep your chats flowing and your data usage predictable.

Confirm your number and enable two‑step verification

Open WhatsApp > Settings > Account > Two‑step verification > Enable.
Set a PIN and add a recovery email. This defends against SIM‑swap attacks and accidental re‑registration.
Check your registered number in Settings > Your profile. If you plan to permanently change numbers, use Settings > Account > Change Number before you travel.

Pro tip: You can use WhatsApp on Wi‑Fi with no SIM in the phone, as long as you don’t log out or reinstall. Don’t delete the app while abroad unless you can receive the verification SMS to your registered number.

Reduce data and control media auto‑download

Settings > Storage and data:
Use less data for calls: ON (helps on weak networks and trims usage).
Media auto‑download:
- When using mobile data: set to None (or Photos only).
- When connected on Wi‑Fi: Photos (optional), leave Videos OFF to avoid hotel Wi‑Fi meltdowns.
Photo upload quality: choose Auto or Data saver.
Manage chat storage: Settings > Storage and data > Manage storage. Bulk‑delete large videos and forwarded media before you go.

Pro tip: Long trips? Archive high‑volume groups and mute them; fewer auto‑downloads and fewer background refreshes.

Encrypt your WhatsApp backups (and keep them off mobile data)

iPhone/Android: Settings > Chats > Chat backup > End‑to‑end encrypted backup > Turn on.
Create a strong password or store the 64‑digit key securely. Lose it, and you can’t restore.
Set backups to run on Wi‑Fi only. On iOS, avoid iCloud mobile data usage by going to Settings > Photos > Mobile Data > OFF (prevents iCloud Photos from consuming your travel data alongside WhatsApp).

Avoid verification headaches abroad

Keep the SIM with your WhatsApp number reachable for SMS/voice if you think you might need to re‑verify (e.g., after a reset).
Link secondary devices before departure: Settings > Linked devices. Linked devices may disconnect if your primary phone is inactive for a while, so open WhatsApp on your main phone when you can.
If you permanently switch numbers, use WhatsApp’s Change Number tool so contacts and groups update cleanly.

iMessage (Apple Messages): control identities, activation, and media

iMessage can use your numbers and/or your Apple ID email. Abroad, stick to your home identity and avoid activating the travel number.

Choose which addresses you use

Settings > Messages > Send & Receive:
Select your Apple ID email and your home number.
Deselect the travel eSIM number (so Apple doesn’t try to activate it and so contacts don’t see a new number).
Start new conversations from: choose your Apple ID email or home number.

Note: Adding a new SIM/eSIM can trigger an iMessage/FaceTime activation SMS, which may be charged at international rates. Deselecting the travel number as above minimises this risk.

Keep data usage low

Settings > Messages:
Low Quality Image Mode: ON (sends smaller photos).
Auto‑Play Message Effects: OFF (saves a bit).
iCloud Photos can dwarf messaging data:
Settings > Photos > Mobile Data: OFF (stops photo library syncing on mobile).
Consider pausing iCloud Drive for the trip (Settings > Your Name > iCloud > iCloud Drive > temporarily OFF) if you sync big files.
Device data guards (iPhone):
Settings > Mobile Data > Data Roaming: OFF on home line; ON on travel eSIM.
Allow Mobile Data Switching: OFF.
Wi‑Fi Assist: OFF.
Low Data Mode (per network): ON for your travel eSIM’s mobile data.

Privacy and backup encryption for Messages

If you use Messages in iCloud and want stronger protection, enable Advanced Data Protection:
Settings > Your Name > iCloud > Advanced Data Protection > Turn On.
Set recovery contacts/keys first. This end‑to‑end encrypts Messages in iCloud.
Alternatively, you can turn Messages in iCloud OFF to keep messages only on‑device (but you’ll lose cloud restore for new messages created while it’s off).

Signal: secure by default, with the right prep

Signal isn’t tied to cloud backups and has robust privacy controls. A little planning smooths travel.

Lock registration and add a strong PIN

Signal > Settings > Account > Registration Lock: ON.
Set a strong PIN and store it in a password manager. This prevents others from registering your number on another device.

Tame media and call data

Settings > Data and Storage:
When using mobile data: Auto‑download media = None (or just Images).
Use less data for calls: ON.
Disable “Allow background data” on Android (system setting) to curb background use.

Backups and transfers

iOS:
Use Signal’s device‑to‑device transfer when changing phones (both devices on the same Wi‑Fi, follow in‑app prompts). Signal messages are not part of iCloud backups.
Android:
Settings > Chats > Chat backups > Create backup.
Save the 30‑digit passphrase in a safe place; you need it to restore. Store the backup file somewhere secure (not just on the phone).

Number changes while abroad

If you’re permanently changing your number, use Signal > Settings > Account > Change phone number. Signal will migrate your profile/contacts and update safety numbers for your contacts.

Device‑level controls that matter on the road

A few system switches make the biggest difference to cost and reliability.

Checklist: - Home SIM: Data Roaming OFF. Voice/SMS ON if you need verification codes. - Travel eSIM: Data Roaming ON. Set as default data line. - Disable Wi‑Fi Assist (iOS) and “Switch to mobile data/Adaptive Connectivity” (Android). - Restrict background data for heavy apps (cloud photos, Drive, music). - Download maps/music for offline use before you fly. - Set messaging apps to use less data for calls and disable video auto‑download. - Use a SIM PIN and device screen lock. If lost, remote‑wipe via iCloud/Google as soon as possible.

For team travel, shared lines and predictable costs, see Simology For Business. Industry partners can explore provisioning and support via our Partner Hub.

Quick How‑To: the 90‑second pre‑flight checklist

1) Install your travel eSIM and set it as the Mobile Data line. Turn off data roaming on your home SIM.
2) iPhone: turn off Wi‑Fi Assist and Allow Mobile Data Switching. Android: disable network “auto switch to mobile data”.
3) WhatsApp: enable Two‑step verification; set Media auto‑download (mobile = None); turn on End‑to‑end encrypted backup (Wi‑Fi only).
4) iMessage: Send & Receive — select Apple ID and home number only; deselect the travel number; turn on Low Quality Image Mode.
5) Signal: enable Registration Lock; set mobile auto‑download to None; prepare iOS transfer or Android encrypted backup if changing devices.
6) Photos/Cloud: disable mobile data for Photos/Drive; queue big syncs for Wi‑Fi only.

FAQ

Q1: Can I use WhatsApp on Wi‑Fi only with no SIM inserted?
Yes. WhatsApp will keep working on Wi‑Fi even without a SIM, as long as you don’t log out or reinstall. If you reinstall or switch phones, you’ll need to receive an SMS/voice call to the registered number to verify.

Q2: Will adding a travel eSIM trigger iMessage activation charges?
It can. Adding a new line may prompt iMessage/FaceTime to send an international SMS for activation. To avoid this, in Settings > Messages > Send & Receive, deselect the travel number so Apple does not activate it. Keep iMessage tied to your Apple ID email and/or home number.

Q3: Are WhatsApp/Signal calls “free” when roaming?
They use data, not minutes. Costs depend on your data plan. Using a local/regional eSIM (e.g., Esim United States or Esim Western Europe) is usually far cheaper than roaming your home SIM’s data.

Q4: Should I change my WhatsApp number to my travel eSIM’s number?
Usually no. Keep WhatsApp on your permanent/home number so contacts don’t lose you. Only use WhatsApp’s Change Number if you’re permanently switching numbers.

Q5: What’s the safest way to back up chats before a long trip?
- WhatsApp: enable End‑to‑end encrypted backups and run a manual backup on Wi‑Fi.
- Signal: iOS uses secure device‑to‑device transfer; Android supports encrypted local backups with a passphrase.
- iMessage: enable Advanced Data Protection for end‑to‑end encrypted Messages in iCloud, or keep Messages in iCloud off if you prefer on‑device only.

Q6: What if my phone is lost abroad?
Use Find My/Find My Device to lock and wipe it. Contact your carrier to block the SIM/eSIM. For WhatsApp, you can register your number on a new device (which logs out the old one). Having WhatsApp two‑step verification/Signal registration lock enabled helps prevent hijacking.

Next step: Choose the right travel data plan for your route via Simology’s Destinations, including regional passes like Esim North America and Esim Western Europe.

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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

SIM Registration by Country (Top 30 Destinations): Do You Need ID? (2025)

Travellers are often surprised to learn that many countries now require “real‑name” registration to activate a local SIM or eSIM. In plain terms: you may need to show ID (usually a passport) and complete a quick form or selfie check before your number works. Other destinations still allow anonymous purchase, especially for data‑only plans. This guide summarises SIM registration by country across 30 of the most-visited destinations, so you know what to expect at the airport kiosk, high‑street shop, or when activating an eSIM in‑app.We update this list quarterly and link out to the most relevant country and regional guides, including Esim United States, Esim France, Esim Italy, Esim Spain, Esim Western Europe and Esim North America. For everything else, browse all country pages via Destinations.What is SIM registration?SIM registration (aka “real‑name registration”) ties a mobile number to an individual using a recognised ID. It usually happens: - At point of sale (airport desk, carrier shop, authorised reseller) - Online or in an app (video KYC, document upload, eID), especially for eSIMAuthorities use it to limit fraud and spam. For travellers, it means carrying your passport and sometimes completing a quick selfie or address check.Quick prep checklist (save this before you fly)Bring your physical passport and one backup photo/scan stored offline.Know your accommodation address (hotel is fine) and a reachable email.Have a payment method that matches your name (card or digital wallet).If you want a local plan on arrival, favour official carrier stores or airport counters for smoother tourist KYC.Consider activating an eSIM before departure to skip queues. Regional options like Esim Western Europe and Esim North America cover multi‑country trips.SIM registration by country: Top 30 (2025)Notes: - “Need ID?” reflects national rules for prepaid activation; retailers can still choose to verify even in “No” markets. - Requirements can change; use this as a traveller’s quick reference and confirm details in‑country.CountryNeed ID?Where to registerAccepted documentsPractical notesUnited StatesNo (not mandated)n/an/aSome carriers may verify identity for fraud prevention. See Esim United States.CanadaNo (not mandated)n/an/aRetailers may request ID at their discretion.MexicoNo (registry suspended)n/an/aThe national registry was struck down; keep passport handy just in case.BrazilYesCarrier store/airport kioskPassport; CPF often requestedTourists can register at major MNO shops; some can assist without a CPF.United KingdomNo (not mandated)n/an/aSome shops may ask for card/ID, but no legal registration for prepaid.FranceYesStore or online/appPassport/EU IDKeep SIM sleeve/contract; eSIM apps usually prompt for ID. See Esim France.SpainYesStore or onlinePassport/EU IDEasy at airports and high‑street shops. See Esim Spain.ItalyYesStore or video KYCPassportSome sellers request a codice fiscale; shops can generate one. See Esim Italy.GermanyYesStore; Postident/video IDPassport/EU IDOnline/eSIM often uses video identification.PortugalYesStorePassport/EU IDSome retailers ask for a local tax number (NIF); not always needed for prepaid.NetherlandsNo (not mandated)n/an/aID checks may occur for age/fraud, but no nationwide requirement.BelgiumYesStore or onlinePassport/eIDSelf‑registration portals common; bring passport.SwitzerlandYesStore or onlinePassport/IDHotel address typically accepted for tourists.GreeceYesStorePassport/EU IDRegister at operator shops or authorised kiosks; keep receipts.TurkeyYesOperator storePassportSIMs tied to device IMEI; unregistered devices may be blocked after ~120 days.PolandYesStore/post officePassport/EU IDRegistration widely available at convenience stores and post offices.IrelandNo (not mandated)n/an/aOperators may do light checks; no statutory prepaid registration.JapanYes (voice); data‑only often noStore or onlinePassportData‑only SIMs/eSIMs can be anonymous; voice/SMS requires ID.South KoreaYesCarrier store/airportPassport; ARC for long staysTourist SIM/eSIM desks at major airports streamline KYC.China (Mainland)YesCarrier service centrePassport; face photoRegistration is mandatory before activation. Bring passport in person.Hong KongYesOnline portal or storePassport/HKIDComplete real‑name registration or the line will be suspended.SingaporeYesTelco shop/retailerPassportMax 3 prepaid lines per person.MalaysiaYesStorePassportPhoto capture/biometric checks common at POS.ThailandYesOperator counterPassportExpect a quick photo capture with your passport.VietnamYesOperator storePassportAddress and photo usually required; use official shops.IndonesiaYesOperator outletPassportLocals use NIK/KK; tourists must register at a provider outlet.PhilippinesYesOnline portalPassportRegister within the stated window under the SIM Registration Act.IndiaYesStorePassport + visaeKYC at carrier stores; a local contact/address may be requested.AustraliaYesOnline or storePassport (visitors)Identity check is mandatory for activation.New ZealandNo (not mandated)n/an/aSome sellers may request ID; no nationwide rule as of 2025.Country and regional guides: Esim United States, Esim France, Esim Italy, Esim Spain, Esim Western Europe, Esim North America, and the full index at Destinations.How to buy and register smoothly (step‑by‑step)Decide eSIM vs physical SIM - Single or multi‑country trip? Consider Esim Western Europe or Esim North America. - Need calls/SMS? Some markets (e.g., Japan) require ID only for voice—data‑only eSIMs are simpler.Prepare documents - Keep your passport ready; jot down your hotel address and a local contact (hotel desk works).Choose the right channel - Airport carrier counters and flagship stores handle tourist KYC fastest. - For eSIM, complete the in‑app KYC with good lighting for any selfie/ID scan.Complete registration - Follow staff guidance or app prompts. Don’t leave until you’ve made a test call or used data.Keep proof - Save the receipt, SIM sleeve, QR code/eSIM email, and any confirmation SMS for the duration of your trip.Pro tips from frequent travellersArriving late? Pre‑activate an eSIM before you fly so you have data for ride‑hailing and maps on landing.Airport vs city: Airport kiosks are efficient but sometimes pricier than city shops; decide what you value more—speed or price.Brazil and Turkey specifics: Use official carrier stores; they’re set up for foreigner KYC and can explain CPF/IMEI rules.UK/US/Mexico: Even where registration isn’t mandated, keep your passport and a payment card handy in case a retailer requests verification.Keep it simple for teams: If you’re coordinating for a group or staff, consider centrally managed plans. See For Business. If you’re a reseller or TMC, explore our Partner Hub.When an eSIM helps vs when it doesn’tHelps:Short trips where you want instant data without visiting a shop.Anonymous data‑only allowed (e.g., many Japan MVNO data plans).Multi‑country itineraries covered by regional products like Esim Western Europe.Doesn’t help:Markets requiring in‑person KYC before activation (e.g., China), or where tourist eSIMs still need document upload.When you specifically need local voice/SMS and the operator mandates full ID.FAQDo I always need a passport to buy a SIM?No. Some countries don’t mandate registration (e.g., US, UK, Mexico, Netherlands, New Zealand). That said, many sellers still prefer to see ID. When ID is required, a passport is the safest bet for travellers.Can I register online for an eSIM instead of visiting a shop?Often yes. Many European operators support video ID or document upload for eSIM activation (e.g., Germany, France, Italy, Spain). In some markets (e.g., China), you’ll still need to visit a carrier store.How long does registration take?In store: 5–15 minutes at airport counters, sometimes longer in city shops. Online/app KYC: usually 2–10 minutes if your photos are clear and documents match.What if I don’t have a local address yet?A hotel address is typically acceptable. If asked for a contact number, use the hotel’s front desk.Will my phone get blocked if I use a local SIM?Only in certain markets with IMEI controls (notably Turkey). Tourists can use their phones for a limited period (commonly around 120 days) without registering the device. This does not affect roaming on your home SIM.Is roaming on my home SIM affected by these rules?No. Real‑name rules apply to activating local SIMs/eSIMs. Roaming with your existing SIM works as normal, subject to your home carrier’s rates.Next step: Plan your connectivity per stop with our country pages and regional eSIMs. Start with Destinations.

31 Oct 2025

Navigation & Offline Maps: Google/Apple Maps with eSIM Fallback

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 fallbackOffline 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 flyiPhone 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 travel1) 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 + CarPlay1) 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 fallbackThe 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 eSIMOffline 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 regionWestern 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 fixesCan’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.FAQ1) 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].

31 Oct 2025