Prices in pounds · Three prices checked 6 November 2026
Three roaming in Vietnam vs a travel eSIM
In Vietnam, Three uses its Go Roam Around the World prices. Here is what that costs for a long weekend, a week and a fortnight, next to a data-only travel eSIM for the same trip.
Three vs eSIM in Vietnam: 3, 7 and 14 days
Three’s lowest published option in Vietnam for each trip length, next to a Graba SIM Vietnam plan with about 0.7 GB a day.
- 3 days
- 7 days
- 14 days
Three roamingGraba SIM eSIM
| Trip | Three | Graba SIM eSIM | Difference |
|---|---|---|---|
| A long weekend3 days | £12.503-day pass | £8.255GB, 30 days | The eSIM is £4.25 less |
| A week7 days | £30.007-day pass | £8.255GB, 30 days | The eSIM is £21.75 less |
| A fortnight14 days | £60.0014-day pass | £25.5010GB, 30 days | The eSIM is £34.50 less |
What’s included: Three: your UK calls, texts and up to 12 GB of your UK data. Graba SIM: data only, prepaid; your Three SIM stays in your phone for calls and texts. Graba SIM prices are live; Three prices checked 6 November 2026.
Sources: Three roaming (checked 6 November 2026). Prices change; check before you buy.
Graba SIM Vietnam plans: data, validity and total price
The 10GB plan costs much more than the smaller sizes here. At about 0.7 GB a day, most week-long trips need around 5 GB.
Each plan is a one-off price for one eSIM. It starts when it first connects in Vietnam, and hotspot use comes out of the same data.
Using your phone in Vietnam
- SGN Ho Chi Minh City
- HAN Hanoi
- DAD Da Nang
- CXR Nha Trang Cam Ranh
- PQC Phu Quoc
- Hanoi and Ho Chi Minh City
- Strong signal across both cities.
- Ha Long Bay
- Good on most cruise routes; some bays and caves are out of range.
- Hoi An and Da Nang
- Strong in town and along the beaches.
- Sapa and the north
- Good in Sapa town; trekking valleys and the Ha Giang loop have gaps.
Networks our Vietnam plans use: Viettel MobileVinaphoneMobiFone
- Grab is the main app for rides and food in Vietnam. It needs mobile data to book and track rides.
- Multi-stop trips use more data than you think: maps, bookings and messages at every stop. About 1 GB a day is a safe guide.
Going further with Three
- Cambodia (Siem Reap and Phnom Penh): Three charges £8 a day (Go Roam Around the World Extra).
- Laos (Luang Prabang): Three charges Standard rates.
- Thailand (onward flights to Thailand): Three charges £8 a day (Go Roam Around the World Extra).
What you get for the money
Three Go Roam Around the World
- £8 a day if you joined or upgraded on or after 18 December 2025; £5 a day if you joined between October 2021 and December 2025.
- Unlocks your UK calls, texts and up to 12 GB of your UK data a month.
- Three only charges on days you use your phone, but your Spend Cap has to be high enough to cover the daily charge or pass, or roaming can stop.
Graba SIM Vietnam eSIM
- 4 plan sizes for Vietnam, from 1GB, 7 days to 20GB, 30 days, each a one-off price.
- Runs on Viettel Mobile, Vinaphone, MobiFone in Vietnam, with 5G where the network offers it.
- Data only. Your Three SIM stays on for calls and texts, so bank codes still reach you in Vietnam.
Three in Vietnam: questions
How much does Three roaming cost in Vietnam?
£8 a day in Go Roam Around the World (£5 on plans from 2021 to 2025), or £30 for a 7-day pass. Unlocks your UK calls, texts and up to 12 GB of your UK data. For a trip, that is 3 days: £12.50 (3-day pass); 7 days: £30.00 (7-day pass); 14 days: £60.00 (14-day pass).
Is a travel eSIM cheaper than Three in Vietnam?
It depends on the trip. Comparing Three’s lowest published option with a Graba SIM plan of about 0.7 GB a day: 3 days, the eSIM is £4.25 less; 7 days, the eSIM is £21.75 less; 14 days, the eSIM is £34.50 less. Three’s price also includes your UK calls, texts and up to 12 GB of your UK data.
Does a Vietnam eSIM work on a Ha Long Bay cruise?
On most routes, yes, with gaps among the more remote islands and inside caves. Save boarding details before you sail.
Does a Vietnam eSIM work in Cambodia or Laos?
No. A Vietnam plan covers Vietnam only. For an overland trip, add a plan for each country or choose an Asia plan that lists them all.