eSIM for study abroad: the first weeks, the switch to a local SIM, and 180-day plans
How to handle mobile data for a semester or year abroad, when a travel eSIM beats a local SIM, 180-day plan prices, bank and phone number needs, and top-ups.
· 10 min read
For a semester abroad, the usual best setup is a travel eSIM for the first two to six weeks, then a local SIM once you have an address, a student ID and a bank account. If you won't need a local phone number at all, a 180-day plan can cover the whole semester on one eSIM: 50 GB for 180 days costs $44 in France, Germany, Italy or Spain, $56 in the UK and $70 in the US. Your home number stays active on the same iPhone for bank codes and family.
The two routes for a semester
There are two sensible ways to do it, and the right one depends on whether you need a local number.
Route A: travel eSIM, then local SIM. You land with data already working, get through the first weeks of admin (accommodation, enrolment, bank, residence registration), and buy a local plan once you can. The travel eSIM covers the gap when a local contract isn't possible yet, which is often the case in the first few weeks.
Route B: one long-validity eSIM for the whole stay. You keep your home number for everything, use the travel eSIM for data, and never sign a local contract. This works well for a single semester when your university, bank and landlord are happy with a foreign number, or you use apps rather than calls.
Most students end up on route A for a full academic year and route B for a four- or five-month exchange. The deciding question is whether something needs a local number that can receive SMS.
What the 180-day plans cost
These are the long-validity plans for the most common study destinations. Prices checked 25 September 2026, in USD; prices can change, and the app shows the current price in your currency.
| Country | Plan | Price (USD) | Approx. GBP | Approx. EUR | Per month over 6 months |
|---|---|---|---|---|---|
| United Kingdom | 50 GB / 180 days | $56.00 | £42.36 | €49.27 | $9.33 |
| France | 50 GB / 180 days | $44.00 | £33.28 | €38.71 | $7.33 |
| Germany | 50 GB / 180 days | $44.00 | £33.28 | €38.71 | $7.33 |
| Italy | 50 GB / 180 days | $44.00 | £33.28 | €38.71 | $7.33 |
| Spain | 50 GB / 180 days | $44.00 | £33.28 | €38.71 | $7.33 |
| United States | 50 GB / 180 days | $70.00 | £52.95 | €61.58 | $11.67 |
Local-currency figures use the 24 September 2026 reference rate and are approximate. Cabin Mode charges in the currency shown in the app.
The catch is the allowance. 50 GB over 180 days is about 8.3 GB a month, or roughly 280 MB a day. That's comfortable for a student who lives on university and flat Wi-Fi and uses mobile data for maps, messaging, transport apps and some social media on the go. It is not enough for someone who streams on the bus, hotspots a laptop, or has no Wi-Fi at home.
When the 30-day plans are better value
If you'll use more than about 8 GB a month, the 30-day plans work out cheaper per GB and you can top up month by month:
| Country | 10 GB / 30 days | 20 GB / 30 days | 50 GB / 30 days |
|---|---|---|---|
| United Kingdom | $8.56 | $16.40 | $34.00 |
| France | $9.40 | $16.40 | $34.00 |
| Germany, Italy, Spain | $8.56 | $16.40 | $34.00 |
| United States | $12.08 | $23.18 | $56.00 |
A worked example for Madrid: five months on the 180-day plan is $44 for 50 GB in total. Five months of 10 GB plans is 5 × $8.56 = $42.80 for 50 GB, with the same data but split into monthly allowances that can't roll over. Five months of 20 GB plans is $82 for 100 GB. So the 180-day plan is the better buy if your usage is uneven (heavy in the first weeks, light once you have Wi-Fi at home), and monthly plans win if you'll reliably use 15 GB or more a month.
Weeks 1 to 6: why the travel eSIM earns its place
The first weeks of a semester are when you most need data and are least able to get a local contract.
- Arrival day. Maps, transit apps and messages to your landlord, working from the moment you land.
- Enrolment and admin. University portals, registration appointments and your new bank app all run on your phone.
- Before you have an address. Local post-paid contracts often ask for a local address, a local bank account or a residence document. Until you have them, prepaid is your only local option, and it may still need ID registration.
For this phase, a 10 GB or 20 GB 30-day plan is usually the right size. If you already know you'll switch to a local SIM, don't buy the 180-day plan: you'd be paying for five months you won't use.
When to switch to a local SIM
Switch when two things are true: you have the documents a local provider wants, and something actually needs a local number.
Signs you need a local number
- Your new bank sends codes to the number on file and won't accept a foreign one, or its app setup needs a local SMS.
- Your landlord, employer or part-time job expects a local number for calls.
- Local services such as a gym, a doctor's surgery, a delivery app or a residence permit appointment system only accept local numbers.
Signs you don't
- Your university accepts your home number or an authenticator app for sign-in.
- You open a digital bank account that works on your home number.
- Your friends and flatmates are on WhatsApp, iMessage or similar, which keep working on your usual number over the eSIM's data.
Requirements to buy a local SIM vary by country. Two examples from the law itself:
- Germany. Under section 172 of the Telecommunications Act (TKG), prepaid providers must check your name, address and date of birth before activating the line. They accept an ID card, a passport or a residence permit, or another procedure approved by the Bundesnetzagentur. You'll usually do this through an online video or app identity check.
- Spain. Under Law 25/2007, buyers of prepaid SIMs must be identified with an identity document. The seller records your name, nationality and the document number.
Other countries have their own rules, and some providers ask for a local tax or ID number. Take your passport and your university enrolment letter to the shop, and check the provider's own website for what it accepts before you go.
Keeping your home number for bank codes
Cabin Mode plans are data only. They have no phone number and no SMS, so your home SIM stays in the phone and keeps receiving calls and texts, including one-time codes from your bank at home. You'll almost certainly need that for the whole semester, because your home bank, student loan provider and parents' card are all tied to that number.
Set it up like this before you fly:
- Install the travel eSIM on Wi-Fi at home.
- In Settings › Cellular, tap Cellular Data and choose the travel eSIM.
- Leave Allow Cellular Data Switching off, so your home line isn't used for data during calls.
- Back in Settings › Cellular, tap your home line and turn Data Roaming off (on some iOS versions it sits under Cellular Data Options). Leave the line itself switched on so SMS arrives.
Receiving an SMS while abroad is free on some home plans and charged on others, so check your own carrier's roaming page. Replying to an SMS or answering a call on your home line abroad is usually charged. Keeping your number, WhatsApp and bank codes working abroad goes through the details.
Once you add a local SIM, your iPhone can use two lines at once: typically the local SIM as your main line and data line, and your home number kept on for SMS. Apple's specs for recent models say they store eight or more eSIMs and keep two active at a time, so you can keep the travel eSIM installed as a backup for trips. Dual SIM on iPhone for travel covers the settings.
Top-ups and the monthly plan
Many plans can be topped up in the app, so the data lands on the same eSIM without reinstalling. That matters on a long stay: you keep one line all semester instead of adding a new eSIM every month.
There's also an optional monthly plan on eSIMs that support top-ups. It adds the same allowance and 30 more days to the same eSIM each month, and you cancel it in the app when you've switched to a local SIM or gone home. For a student on route A, this is a tidy way to handle the first two or three months and then stop.
On start dates: most plans start on first network connection in the destination, and a few start at install. The plan listing shows which, so don't install a 180-day plan months early if its listing says it starts at install.
Weekend trips and term breaks
Study abroad rarely stays in one country. A semester in Europe usually includes weekend trips, and a year in the US might include Canada or Mexico.
A country plan covers that country only. For trips inside Europe, add a regional plan for the weekend, or use the Europe package: 5 GB for 30 days is $5.64 and 10 GB is $11.72. It covers every EU country plus the UK, Switzerland, Norway, Iceland and Liechtenstein, but not Turkey, Serbia, Ukraine or the Channel Islands. Your country plan stays installed, and you switch the data line back when you return.
If you're from an EU country studying in another EU country, your home plan may already roam at no extra charge under EU rules, subject to fair-use limits that can apply on long stays abroad. Check your own provider's fair-use terms before paying for anything.
When not to use a travel eSIM
- A full year with lots of local calls. A local plan with minutes will be cheaper.
- No Wi-Fi at home and heavy streaming. 50 GB over six months won't last, and monthly 50 GB plans cost more than most local unlimited plans in Europe.
- Your iPhone is carrier-locked. A locked phone won't take any other eSIM or SIM. Ask your carrier to unlock it before you leave. Cabin Mode is iPhone only; see which iPhones support eSIM.
- A local number is required from day one, for example by a visa appointment system. Buy the local SIM first and use the travel eSIM only as a backup.
For the longer view on months abroad, including remote work, see eSIMs for digital nomads and long stays.
Frequently asked questions
Should I get a local SIM or an eSIM for study abroad?
Use a travel eSIM for the first weeks, then decide. If you need a local number for a bank, landlord or job, switch to a local SIM once you have the documents. If you don't, a 180-day plan can cover a single semester on one eSIM.
Is 50 GB enough for a semester abroad?
It's about 8 GB a month over six months. That's enough if you have Wi-Fi at home and on campus and use mobile data for maps, messaging and social media. Heavy streamers should use 20 GB monthly plans or a local plan instead.
Can I keep my home number while studying abroad?
Yes. The travel eSIM is data only, so your home SIM stays active for calls and SMS, including bank codes. Turn Data Roaming off on your home line so it doesn't use data, and check what your carrier charges to receive texts abroad.
Do I need a local phone number to open a bank account abroad?
It depends on the bank and country. Some banks send verification codes only to a local number, while others accept a foreign one or use app-based approval. Check the bank's own requirements before you choose it, and keep your travel eSIM as your data line while you set it up.
Can I top up a travel eSIM for a whole semester?
Many plans can be topped up in the app, adding data to the same eSIM. Eligible plans also have an optional monthly plan that renews the allowance every 30 days until you cancel it.
When does a 180-day eSIM start?
Most plans start on your first connection to a network in the destination, and a few start at installation. The plan listing in the app shows which, so check it before installing a long plan early.
Can I use my study abroad eSIM in other countries?
A country plan works in that country only. For weekend trips, add a second plan or a regional plan such as the Europe package, and switch your data line in Settings while you're away.