eSIM for students abroad: how to stay online all semester

Last updated: September 6, 2026

Nobody warns you about the first afternoon. You land, the airport Wi-Fi wants a phone number you don't have yet, the taxi app won't load, and the email with your room's door code is sitting on a server you can't reach. An eSIM for students abroad exists for exactly that gap. You buy a data plan before you fly, install it at home, and it comes alive the moment your phone finds a network at the other end.

This is the practical version of the guide. What an eSIM does and doesn't do over a semester, how to keep your home number alive for bank codes, how much data a student really gets through, which plan sizes make sense, and where a local SIM still beats us. We sell eSIMs, so read the recommendations with that in mind. We'd still rather you buy the right thing once than the wrong thing twice.

The first weeks are the whole argument

A local phone contract is the cheapest way to get a year of data, and you can't get one on day one. In Germany you'll be asked for a registered address (the Anmeldung) and usually a German bank account. In France most contracts want a French bank account, and opening one tends to want proof of address and a working phone number, a loop you're standing outside of when you arrive. The UK and the US are relaxed about prepaid, but a shop visit still needs you to know where the shop is.

Prepaid SIMs from a kiosk are the traditional fix and they still work. The catch is timing. You need to be there in opening hours with your passport, and in several EU countries the SIM stays dead until an identity check clears. An eSIM removes the queue. You buy it online, the QR code lands in your inbox within minutes, and the plan sits on your phone until you need it. That's the entire pitch: you're online while you sort out everything else.

Keep your home SIM in the phone

This is the part students get wrong most often, and it's an expensive mistake. Your bank, your university portal and half your apps still send codes to your home number. Leave that SIM where it is. On a dual-SIM phone both lines stay registered: the eSIM carries your data, the home SIM keeps receiving calls and texts. Set the eSIM as your mobile data line, then switch data roaming off on the home SIM so it can't quietly run up a bill.

Two things to check with your home carrier before you leave. First, what receiving a text or a call abroad costs on your plan. Incoming texts are usually free, incoming calls often aren't. Second, and this one catches people on a year abroad: prepaid numbers get cancelled after a stretch of inactivity, anywhere from three months to a year depending on the carrier. Top the home SIM up now and then, or move it to the cheapest plan that keeps the number alive.

Where you can, move two-factor authentication to an authenticator app instead of SMS. It works on any connection, including campus Wi-Fi, and it doesn't care which country your SIM is in.

The exact settings for iPhone and Android are in our dual-SIM guide.

A data-only eSIM won't give you a local number

Worth saying plainly, because tourists rarely care and students do. Our eSIMs are data only. There's no local phone number attached, so no local SMS and no ordinary calls. WhatsApp, FaceTime, Telegram and Teams all work fine over data, and for most of daily life that's enough.

But a landlord may insist on ringing a local number. Some banks will only send verification codes to a domestic one. A university might text you a locker code. If you hit that wall, get a cheap local prepaid SIM for the number and keep using the eSIM for data, or move to a local plan for good once you have an address and a bank account. A lot of students settle into this split by the second month: local SIM for the number, eSIM for weekend trips across a border, home SIM for the bank. All three fit in one modern phone.

How much data does a semester actually take?

Less than you fear on campus, more than you expect everywhere else. Universities almost all run eduroam or their own Wi-Fi, and most student housing has something, even if it's slow and blocks half the ports. Mobile data ends up covering the commute, the city, the first weeks before your room is connected, and the evenings when the dorm network gives up.

Rough numbers, because the exact figures depend on your apps. Map navigation is tiny, well under 10 MB an hour. Music streaming is around 50 to 100 MB an hour. Scrolling short video is the budget killer at roughly 1 GB an hour. A video call runs about half a gigabyte to a gigabyte an hour, and a recorded lecture at 720p is close to a gigabyte an hour as well.

If you're between two rows, buy the bigger one. Running dry on the 26th of the month costs more in stress than the few euros or dollars you saved.

For the same sums applied to an ordinary trip, see how much data you need for travel.

Why we don't push unlimited plans at students

It sounds like the obvious semester choice and it isn't. Our standard Unlimited plan gives you 1 GB a day at full speed, then unlimited data at 1.25 Mbps until the day resets. That's fine for messaging, maps and music. It's a bad night for a video call and a worse one for a lecture recording. It also runs at most 30 days, like every single-country plan, and costs about three times what a 20 GB plan does.

Unlimited Plus has a far bigger full-speed pool, 6 GB for every day of validity, spent whenever you like, but it only comes in 5, 10 and 15 day lengths and isn't offered for every country. It's built for a short heavy trip, not a term. For a student the boring answer is the right one: a 20 or 50 GB plan for 30 days, bought again when it runs out.

One country, or the whole of Europe?

If you're studying in one country and mostly staying put, buy the plan for that country. It's cheaper per gigabyte than any regional plan, every time. Germany, France and the UK each have 10 GB for 30 days at about 11 to 13 US dollars as we write this; the same 10 GB on a Europe-wide plan runs from about 14 to 27 dollars depending on how many countries it covers.

The regional plan earns its price the moment you start moving. Erasmus semesters have a way of turning into weekend trips, and our Europe plan covers more than 30 countries including the UK, Switzerland and Turkey, which the EU roaming rules leave out. Cross a border and the same eSIM keeps working. Nothing to buy at the station.

One more option most students don't know exists. Our Europe + USA plans run for 60, 90 and 180 days with 20 to 100 GB, and cover nearly 40 countries on both sides of the Atlantic. They're the only plans in our catalogue that last a whole term on a single purchase. You pay more per gigabyte than on a national plan, but you buy once in September and don't think about it again until the exams.

Compare the two on their own pages: Europe eSIM plans and Europe + USA long-stay plans.

What it costs, roughly

Prices move with exchange rates and with what our supplier charges us, so treat these as the shape of the thing rather than a quote, and check the live price on the country page before you buy. As of September 2026, 30-day plans for the four biggest study destinations look like this in US dollars:

So a regular-use semester in Germany or France, four 20 GB plans back to back, comes to roughly 75 dollars for the term. The US is the expensive one, as it is for the locals. A UK or EU prepaid SIM with a similar allowance can be cheaper per month once you're able to get one, which is exactly why the eSIM-first, local-SIM-later approach above is the one we'd follow ourselves.

The ten-minute checklist before you fly

1. Check that your phone is unlocked and eSIM-capable. Dial *#06#; if an EID shows up, you're fine. Phones bought on a contract are often locked, and an unlock can take your carrier a few days to process, so do this first, not at the gate.
2. Buy the plan for your first month, not the whole term. You'll know far more about your Wi-Fi situation after two weeks.
3. Install it at home on Wi-Fi, from the QR code in your order email. Installing doesn't start the clock. The validity begins the first time the eSIM actually uses data at your destination.
4. Label the line something like 'Study data', set it as your mobile data line, and leave its data roaming off until you land. On iPhone, also turn off Wi-Fi Assist, so a weak home Wi-Fi signal can't start the plan a day early.
5. Turn data roaming off on your home SIM. Keep it in the phone and switched on for calls and texts.
6. Download offline maps for your city and screenshot your accommodation's address. Boring, and the thing you'll be gladdest you did.

Three guides worth opening before you board: how to install and activate an eSIM, which phones support eSIM and what to do when an eSIM will not connect.

When the plan runs out in week three

It will happen at least once. Plans never renew by themselves and we never charge you again unless you buy something, which is the point, but it does mean the ball is in your court. Sign in to your account to see how much data and validity is left. If your plan supports a top-up, you add data to the same eSIM and nothing needs reinstalling. If it doesn't, buy a new plan for the same country and install it as a second eSIM. The new one only starts when it's first used, so buy it a couple of days before the old one dies rather than the night it does.

Validity counts down whether or not you use the data, so a 30-day plan that starts on the 1st is gone on the 31st even with 8 GB left, and unused data doesn't roll over. If you bought a plan and never installed it, you can get a full refund within 30 days. Once it's activated, it's yours.

Details in how to top up your eSIM and our refund policy.

Notes on the big four destinations

United States

Campus Wi-Fi is generally good and dorms are usually wired, so plenty of students get by on a 10 or 20 GB plan. Local prepaid is easy to find but not cheap. And phones sold by US carriers are frequently locked, which matters most if you're an American student heading the other way: get the unlock sorted before you leave. United States eSIM plans

United Kingdom

Prepaid SIMs are cheap and everywhere, so the eSIM's job here is the first fortnight and any trips to the continent. Remember the UK sits outside the EU roaming rules. An EU SIM you pick up later may charge you to roam in Britain, and vice versa, which is where a Europe-wide eSIM that includes the UK quietly earns its keep. United Kingdom eSIM plans

Germany

The country where the eSIM matters most. Contracts want an Anmeldung and usually a German bank account, prepaid SIMs need an identity check before they activate, and registration appointments in the big cities can take weeks. Plan on running the eSIM for the first month or two, not the first weekend. Germany eSIM plans

France

Prepaid is easy to buy at a tabac, but contracts want a French bank account, and banks want an address and often a phone number. The eSIM breaks that loop. Wi-Fi in French student housing varies wildly, so lean towards the bigger plan for the first month until you know what you've got. France eSIM plans