The flights are booked: Madrid or Paris first, then Rome, perhaps London at the end. Then the phone questions arrive together: daily roaming charges, whether the phone is unlocked, the bank's texts, and which countries one plan covers. Europe's Roam Like at Home rules do not help, because they apply only to SIMs from EU countries.
This guide answers them for anyone choosing an eSIM for a first trip to Europe from the US, Canada or Latin America, from checking the phone to choosing between the Europe and Europe Extended plans.
Key facts for a first trip to Europe from the Americas
- EU roaming: Roam Like at Home is for EU SIMs only; a SIM from the Americas roams on its carrier's own terms
- One plan for the route: Europe covers 38 destinations; Europe Extended covers 56, adding Iceland, Turkey, the Western Balkans and more
- Your phone: it must be unlocked to use another provider's eSIM; US iPhone models from the iPhone 14 onwards are eSIM-only
- Your number: your home line stays in the phone for calls and texts while the travel eSIM carries the data
- Emergency numbers: 112 in every EU country; 999 or 112 in the UK
Why carrier roaming adds up
Roaming on a SIM from the Americas is priced by your carrier, not by European rules, and many carriers sell it as a daily pass. On a two-week trip that charge is repeated every day you use the phone, even if all you do is check a map.
A travel eSIM works differently: you pay once for a data plan, with no subscription, and it runs alongside your home line. For travellers from the United States, a Telcomia eSIM can be up to 10x cheaper than US carrier roaming in Europe.
Is your phone ready for an eSIM?
A travel eSIM needs two things from the phone. First, eSIM support: on an iPhone, look for the option to add an eSIM under Settings > Cellular (or Mobile Data); on Android, look in the SIM settings.
Second, it must be unlocked. Phones bought on a carrier contract may be locked to that carrier, and a locked phone cannot use another provider's eSIM, so ask your carrier to unlock it well before you fly. If you have a US iPhone from the iPhone 14 onwards, there is no SIM tray at all: your own number is already on an eSIM, and the travel eSIM is added alongside it.
Keeping your number for bank texts
Dual SIM is what keeps your number. Your home line stays switched on for calls and texts, so bank codes still reach it, while the travel eSIM, which is data only with no local number, is set as the line for mobile data. Turn data roaming off on the home line and on for the eSIM.
Calls and messages to people at home can go through apps such as WhatsApp over the eSIM's data. Calls and texts on your home line still follow your carrier's roaming terms, so check them before you go.
Which plan fits your trip
The Europe plans cover 38 destinations: most EU countries plus the UK, Switzerland, Norway and others. If your route adds Iceland, Turkey or the Western Balkans, choose the Europe Extended plans, which cover 56. Either way, check that every country on your route appears in the plan's list.
For one country there are country plans too. Each plan's details show the Activation line, the duration, the data and whether you can share the connection.
Before you leave
- If you bought the phone on a contract, ask your carrier to unlock it.
- Install the eSIM at home on Wi-Fi from the QR code in your email.
- Set the eSIM as the line for mobile data, with data roaming on for it and off for your home line.
- Keep your home line switched on for bank texts, and check your carrier's terms for calls and texts abroad.
- Download offline maps for your first city and save 112 in your contacts.
- Keep the eSIM until the trip is over: some eSIMs can be installed only once.
Consular protection: getting help in Europe
- 112 reaches emergency services in every EU country; in the UK, call 999 or 112.
- In Spain, France, Italy and the UK, embassies are in Madrid, Paris, Rome and London, and many countries also have consulates in other large cities. The Telcomia app shows which mission is responsible for you, with address and phone.
- Emergency phrases in Spanish, French, Italian and other European languages are ready to show on screen in the app.
Questions travellers ask about an eSIM for a first trip to Europe
Will my US phone work in Europe?
Recent smartphones generally work on European networks. To use a travel eSIM, the phone must also support eSIM and be unlocked; US iPhone models from the iPhone 14 onwards are eSIM-only, so they already support it.
Should I use my carrier's international day pass?
It is the simplest option, since nothing needs setting up, but it is charged by the day. A travel eSIM is paid once for the whole plan, and your home line stays in the phone for texts.
Can I keep my US number for bank texts?
Yes. Keep your home line switched on with its data roaming off: texts, including bank codes, still arrive on it while the eSIM carries your data. Check your carrier's terms for texts received abroad.
Europe or Europe Extended?
Europe covers 38 destinations, including most EU countries, the UK, Switzerland and Norway. Choose Europe Extended, with 56, if your route includes Iceland, Turkey or the Western Balkans, such as Albania, Montenegro or Serbia.
The short version
Get your phone unlocked, install the eSIM at home on Wi-Fi, and keep your home line on for bank texts with its data roaming off. Choose Europe for a classic route, or Europe Extended if Iceland, Turkey or the Western Balkans are on it.
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