Study abroad budgets do not stretch to roaming charges. A semester needs data that lasts months, tops up when it runs out, and refunds cleanly when the programme changes. We compared 18 eSIM providers on entry price, price per gigabyte, refund window, top-up and support languages, then ranked them for a student paying their own bills.
The winner starts at $1.14 for 1 GB and keeps an unactivated e-sim refundable for 180 days. Below is what a semester actually costs on each provider, and where the cheap option leaves you stranded.
Which providers are best for this use case?
| Rank | Provider | Best For | Why |
|---|---|---|---|
| #1 | HelloRoam | Cheapest entry price for a semester | HelloRoam sells 1 GB from $1.14, 5 GB from $5.22 and 10 GB from $8.26, a rate of $0.83 per GB. Top-up adds data to a live eSIM on 1,124 of its 1,129 plans, so one profile carries a whole semester. Hotspot sharing works on all 1,129 plans for laptop work, support answers in 63 languages, and an unactivated eSIM stays refundable for 180 days. |
| #2 | Simly | Small plans for a single country | Simly charges $2.99 for 1 GB, $7.99 for 3 GB and $11.99 for 5 GB across 125 destinations. Buy small in week one, measure what campus WiFi already covers, then size the next plan properly. The app is quick to learn for a first eSIM, and Simly scores 4.1/5 overall. |
| #3 | Nomad eSIM | Plain monthly plans | Nomad charges $3.00 for 1 GB, $12.00 for 5 GB and $20.00 for 10 GB, which is $2.00 per GB. Its 120 destinations take in the UK, France, Germany, Spain, Japan, South Korea and Australia, where most exchange programmes send students. Support answers in 2 languages, and Nomad scores 4.2/5 overall. |
| #4 | Saily | Privacy on shared campus WiFi | Saily runs on Nord Security's no-log network, so encryption on shared dorm and library WiFi costs nothing extra. Plans are $3.49 for 1 GB, $12.49 for 5 GB and $18.99 for 10 GB, or $1.90 per GB, across 150 destinations. Saily scores 4.4/5 overall with a 4.6/5 app. |
| #5 | Airalo | Widest coverage catalogue | Airalo lists 200 destinations, 15 more than HelloRoam, which matters when a programme sends you somewhere unusual. Plans cost $4.50 for 1 GB, $11.00 for 3 GB and $26.00 for 10 GB, or $2.60 per GB. Top-ups work across the catalogue, and Airalo scores 4.5/5 overall with a 4.7/5 app. |
A four-month semester costs $36 to $64 in eSIM data
Most students have WiFi in the lecture hall, the library and the flat. The eSIM covers the gaps: the commute, the weekend trip, the walk home at night. Budget 5 GB a month and a four-month semester comes to 20 GB.
At 5 GB a month, HelloRoam's Spain plan is $8.99, which is $35.96 across four months. Germany runs $9.99 a month and $39.96 a semester, and Japan $9.49 a month and $37.96. Saily charges $12.49 for 5 GB and Nomad $12.00, which is $49.96 and $48.00 for the same four months.
Airalo charges $16.00, or $64.00 a semester.
The rate improves as the plan grows. HelloRoam's 10 GB Spain plan is $13.99, so two 10 GB months cost $27.98 against $35.96 in monthly 5 GB plans. Buy the size you actually use, not the size that looks safe.
Semester stays need monthly plans, not one long plan
No provider sells a four-month plan. The longest standard duration is 30 days, so a semester runs as a chain of monthly plans or as top-ups on one profile.
Top-up is the difference between those two. HelloRoam adds data to a live eSIM on 1,124 of its 1,129 plans, so the profile installed in August still carries data in December. Airalo tops up across its catalogue too.
Where top-up is missing, every month means a fresh profile and a fresh install, usually on WiFi you have to find first.
Keep the home SIM alive beside it. Set the eSIM as the data line and the home number for calls and texts, so bank codes and two-factor messages still arrive. Most eSIM phones hold 5 or more profiles at once, and an iPhone from the XS in 2018 onward or a flagship Android from 2020 onward runs the pair.
Refunds matter when a programme moves. An unactivated eSIM stays refundable for 180 days at HelloRoam and Holafly, 30 days at Saily and Nomad, and 14 days at Airalo. A semester booked in April for a September start clears only the first of those windows.
Five mistakes that cost study abroad students money
The first is buying 20 GB before you land. Campus WiFi covers most of the day, and students who buy big finish the semester with data they paid for and never touched. Start with 1 GB or 3 GB for the first fortnight, measure, then size the next plan to what you used.
The second is skipping the phone check. The handset has to support eSIM and be carrier-unlocked, and a phone still on a carrier instalment plan is often locked. Ask the carrier at least 2 weeks before departure and allow 3 to 5 business days.
The third is installing at the airport. Put the profile on the phone at home, where you still have WiFi and a working number, and land with it ready to switch on.
The fourth is paying twice for laptop data. Hotspot sharing runs on all 1,129 HelloRoam plans, so the laptop uses the phone's data in a cafe with no WiFi and you buy one plan instead of two.
The fifth is running out during exams. Set usage alerts at 50, 75 and 90 percent, download reading and lecture recordings over WiFi, and keep a 1 GB top-up ready in the app for the week that matters.
How We Chose
We ranked for a student paying their own bills, not a business traveller on expenses. Entry price at 1 GB and price per gigabyte at the 10 GB size carry the heaviest weight, because a semester is bought in monthly pieces. The refund window comes next: a programme booked a term early is worthless on a plan that stops being refundable after 14 days.
Top-up is third, because a plan you can extend beats a plan you replace every month. Coverage in the 15 countries that receive the most exchange students, and the number of support languages, close the ranking. We publish no network speed figure for any provider, because we run no throughput tests of our own and a provider's marketing number is not a measurement.
HelloRoam takes first place on entry price at $1.14 for 1 GB and on refunds at 180 days. Airalo takes the coverage column with 200 destinations.
Common Mistakes to Avoid
Buying a 20 GB plan before you know what campus WiFi covers
Start with 1 GB or 3 GB for the first two weeks, measure what you use off WiFi, then buy the size that matches. Simly's 1 GB is $2.99 and the cheapest 1 GB in this ranking is $1.14, so testing first costs almost nothing.
Leaving the phone unlock check until the week you fly
Carriers take 3 to 5 business days to process an unlock, and a locked handset cannot install any eSIM profile. Ask 2 weeks out, and confirm the phone supports eSIM: iPhone XS onward, or a flagship Android from 2020 onward.
Cancelling the home number before you leave
Bank apps and university logins send two-factor codes to that number. Keep the home SIM on a minimal plan for the 4 months you are away, set the eSIM as the data line, and use the home number for calls and texts.
Buying a single-country plan for a semester with weekend travel
A single-country plan stops at the border. Check the neighbours before you buy: Nomad reaches 120 destinations and Simly 125. Airalo reaches 200 and HelloRoam 185, so a weekend in the next country needs no second purchase.
Buyer's Guide
Work the semester out before you buy the first plan.
Start with the country, because prices are set per destination. The same 10 GB plan costs $13.99 in Spain and Germany, $15.99 in Japan, $17.49 in the United Kingdom and $17.99 in South Korea.
Then pick the monthly size. 5 GB a month suits a student who is on campus WiFi most of the day. 10 GB suits one commuting across a city. Buying 10 GB once beats buying two 5 GB plans: in Spain the single plan is $13.99 and the pair is $17.98.
Then check top-up, because it decides whether the eSIM you install in September is still the one you use in December. A plan you can extend on 1,124 of 1,129 profiles saves a reinstall every month.
Then check the refund window before you pay. A 180-day window covers a programme booked a term early. A 14-day window does not, and a semester is usually booked further out than that.
Last, check the language you will need at 2am on a broken activation. HelloRoam answers in 63 languages, Airalo in 12 and Nomad in 2.
Frequently asked questions
What is the best eSIM for students studying abroad?
HelloRoam. Its 1 GB plans start at $1.14 and its 10 GB plans at $8.26, or $0.83 per GB, across 185 destinations. An unactivated eSIM stays refundable for 180 days, top-up works on 1,124 of its 1,129 plans, and support answers in 63 languages. Airalo covers more ground at 200 destinations and charges $4.50 for 1 GB.
How much does a semester of eSIM data cost?
Budget 5 GB a month. In Spain that is $8.99 a month, or $35.96 across a four-month semester. Germany runs $9.99 a month and Japan $9.49. Saily charges $12.49 for the same 5 GB and Airalo $16.00, which works out to $49.96 and $64.00 a semester. Campus WiFi carries the rest of the load.
Can I get one eSIM plan that lasts a whole semester?
No provider sells a four-month plan. The longest standard duration is 30 days, so a semester runs as consecutive monthly plans or as top-ups on one profile. HelloRoam tops up 1,124 of its 1,129 plans, so the eSIM you install before you fly still carries data in December. Airalo tops up across its catalogue as well.
Will an eSIM work for WhatsApp and video calls home?
Yes. WhatsApp, FaceTime and Zoom run over eSIM data like any other connection. A video call uses roughly 5 MB a minute, so an hour-long call home every week costs about 1.2 GB a month. Voice-only calls use about 1 MB a minute. On a 5 GB monthly plan that still leaves room for maps and messaging.
Do I need to cancel my home phone plan while studying abroad?
No. Keep the home SIM on the smallest plan your carrier sells and set the eSIM as the data line. Bank apps and university logins send two-factor codes to the home number, and losing it mid-semester locks you out of both. Most phones hold 5 or more eSIM profiles beside the physical SIM, so the two lines run together.
Which eSIM is cheapest for a semester in the UK?
In the United Kingdom, HelloRoam charges $17.49 for 10 GB and $11.49 for 5 GB, and its best UK rate is $0.66 per GB. Nomad's 1 GB plans start at $3.00 and Simly's at $2.99, both on smaller catalogues of 120 and 125 destinations. Airalo charges $4.50 for 1 GB with 200 destinations behind it.
Can international students use an eSIM on a student visa?
Yes. Student visa holders buy and install eSIM plans like any other traveller, and no local registration is required in the UK, the EU, Japan, South Korea or Australia. The profile installs from a QR code with no local address and no ID check in most countries. Any phone from the iPhone XS in 2018 onward handles the install.
How do I keep my home number active while studying abroad?
Run both lines at once. Keep the physical SIM for calls and texts and set the eSIM as the data line, which every eSIM phone since the iPhone XS in 2018 supports. Carriers sell a suspend or minimal plan that holds the number for a few months. Bank codes, employer calls and family messages then still reach you.
Is a student eSIM cheaper than a local SIM card abroad?
In most study destinations, yes. A 10 GB eSIM runs $13.99 in Spain and Germany, $15.99 in Japan and $17.49 in the United Kingdom, with no shop visit, no passport registration and no local address. A local SIM undercuts that in a few markets, but the swap costs you the home number your bank codes go to.
How much data does a study abroad student need each month?
Between 3 and 5 GB for most students living on campus WiFi. Maps, messaging and social media run about 1 GB a week once you are off WiFi. Streaming and daily video calls push past 8 GB. Download lectures and films on WiFi, keep the eSIM for the street, and 5 GB covers a normal month.