Everything you need to know about eSIM — what it is, how to activate it before you fly, and whether it's the right choice for your next trip.
Find eSIM PlansAn eSIM is a digital SIM card embedded directly into your device. Instead of buying a physical SIM on arrival — queuing at an airport kiosk, figuring out local packaging, hoping it works — you activate a travel plan from your phone before you even board.
The shift to eSIM is one of the most practical upgrades a frequent traveller can make. No more drawer full of foreign SIM cards, no more relying on expensive roaming packages from your home carrier, and no risk of losing your main SIM while swapping it out.
A traditional SIM card is a small removable chip that identifies your device on a mobile network. An eSIM (embedded SIM) does the same job — but it's soldered directly into your phone's motherboard. You can't physically swap it, but you can reprogram it wirelessly by downloading a new "SIM profile" from a provider.
In practice: you buy a data plan online, receive a QR code by email, scan it with your phone's camera, and within a few seconds your device has a new local number and data connection for your destination. You can store multiple eSIM profiles at once and switch between them from Settings.
Which phones support eSIM? iPhone XS (2018) and all later models. Samsung Galaxy S20 and later. Google Pixel 3 and later. Most flagship Android devices released since 2021. To confirm: on iPhone, go to Settings → General → About and look for an EID number. On Android, go to Settings → Network → SIM cards. Note that some carrier-locked devices may restrict third-party eSIMs even when the hardware is compatible — check with your home carrier first if unsure.
Both work. The choice depends on your trip length, the number of countries you're visiting, and how much data you need. Here's an honest side-by-side.
| eSIM | Physical SIM | |
|---|---|---|
| Setup | Before you fly — QR code scan at home | Buy locally on arrival (airport, convenience store) |
| Speed of access | Instant — data works as soon as you land | Requires finding a store, potentially queuing |
| Cost | Varies — competitive on short trips, multi-country | Often cheaper per GB for longer stays in one country |
| Multi-country | Single regional plan covers multiple countries | May need a new SIM per country |
| Device requirement | eSIM-compatible phone only | Works on any unlocked phone with a SIM slot |
| Home number | Stays active via dual SIM | May need to remove home SIM to insert travel SIM |
| Reusability | Some plans can be topped up; others single-use | Can often top up locally; discard when done |
Short trips (under 3 weeks) where the convenience of instant activation outweighs the slightly higher per-GB cost of travel-specific plans.
Multi-country routes — a single Europe or Asia-Pacific regional eSIM covers multiple countries without re-buying.
Last-minute departures — no time to shop for a local SIM, no language barrier to navigate at a foreign counter.
Travellers who can't swap SIMs — if your phone is carrier-locked to your home SIM, a secondary eSIM for data is the cleanest solution.
Long stays (4+ weeks) in one country — local carriers frequently offer much better data/cost ratios than international travel plans.
High data needs — if you're working remotely and need 30–50 GB a month, a local plan usually offers better value.
Older or budget phones — not eSIM-compatible. A physical SIM is your only option on most mid-range Android devices.
Countries with limited eSIM coverage — some markets in Central Africa and parts of South Asia have patchy eSIM provider support.
The whole process takes under five minutes and should be done on a stable Wi-Fi connection at home — not rushing through airport security.
Most major eSIM providers cover 190+ countries, but coverage quality and plan availability vary significantly by region. Here's what to expect.
Excellent coverage across all EU countries plus the UK, Switzerland, Norway, Iceland and the Balkans. Regional plans work seamlessly across borders. Most providers offer 4G/LTE as standard, with 5G available in major cities on premium plans.
Strong coverage in Japan, South Korea, Thailand, Singapore, Bali, Vietnam and the Philippines. China requires specific plans — standard international eSIMs don't bypass the Great Firewall. Australia and New Zealand are well-covered. Remote Pacific islands are generally not supported.
Comprehensive coverage across the USA, Canada and Mexico. Most Central American countries are well-supported. South America coverage is strong in Brazil, Argentina, Chile, Colombia and Peru; more limited in remote Amazonian and Andean regions. The Caribbean varies significantly by island.
UAE, Saudi Arabia, Qatar, Turkey and Israel are well-covered. Most North African countries (Morocco, Egypt, Tunisia) are supported. Sub-Saharan Africa coverage is concentrated in South Africa, Kenya, Nigeria and Ghana. Remote or conflict-affected regions typically have no eSIM support.
Compare plans, check coverage for your destination, and activate your eSIM before you leave — all from your phone.
Find eSIM Plans →External link — CityPlanAI is not yet an affiliate of this provider