Prices in pounds · Three prices checked 6 November 2026
Three roaming in Thailand vs a travel eSIM
In Thailand, Three uses its Go Roam Around the World Extra 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.
Photo: Johnny Africa on Unsplash
Three vs eSIM in Thailand: 3, 7 and 14 days
Three’s lowest published option in Thailand for each trip length, next to a Graba SIM Thailand 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 | £17.503-day pass | £6.255GB, 30 days | The eSIM is £11.25 less |
| A week7 days | £42.007-day pass | £6.255GB, 30 days | The eSIM is £35.75 less |
| A fortnight14 days | £82.255-day pass + 3 × 3-day passes | £9.7510GB, 30 days | The eSIM is £72.50 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 Thailand plans: data, validity and total price
Each plan is a one-off price for one eSIM. It starts when it first connects in Thailand, and hotspot use comes out of the same data.
Using your phone in Thailand
- BKK Bangkok Suvarnabhumi
- DMK Bangkok Don Mueang
- HKT Phuket
- USM Koh Samui
- CNX Chiang Mai
- Bangkok
- Strong signal across the city, on the BTS Skytrain and on the MRT.
- Phuket and Krabi
- Good in resorts and towns; long-tail boat trips to outer islands can lose signal.
- Koh Samui, Koh Phangan and Koh Tao
- The main beaches are covered; quieter bays on the far side of the islands are patchier.
- Chiang Mai and the north
- Good in the city; the mountain road to Pai has gaps.
- Koh Phi Phi and Koh Lanta
- Covered around the main villages and piers.
Networks our Thailand plans use: TrueMove HDTACAISTrue Move
- A two-week trip suits a 15-day or 30-day plan. Check the validity covers your last day, not just your first.
- Grab, maps and translation apps are what most travellers use data for. About 1 GB a day is plenty for most people.
Going further with Three
- Cambodia (side trips to Siem Reap for Angkor Wat): Three charges £8 a day (Go Roam Around the World Extra).
- Malaysia (Langkawi and Penang): Three charges £8 a day (Go Roam Around the World Extra).
- Laos (the slow boat to Luang Prabang): Three charges Standard rates.
What you get for the money
Three Go Roam Around the World Extra
- £8 a day if you joined or upgraded on or after 18 December 2025; £7 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 Thailand eSIM
- 4 plan sizes for Thailand, from 1GB, 7 days to 20GB, 30 days, each a one-off price.
- Runs on TrueMove H, DTAC, AIS in Thailand, 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 Thailand.
Three in Thailand: questions
How much does Three roaming cost in Thailand?
£8 a day in Go Roam Around the World Extra (£7 on plans from 2021 to 2025), or £42 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: £17.50 (3-day pass); 7 days: £42.00 (7-day pass); 14 days: £82.25 (5-day pass + 3 × 3-day passes).
Is a travel eSIM cheaper than Three in Thailand?
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 £11.25 less; 7 days, the eSIM is £35.75 less; 14 days, the eSIM is £72.50 less. Three’s price also includes your UK calls, texts and up to 12 GB of your UK data.
Does a Thailand eSIM work on the islands?
Yes on the popular islands, such as Phuket, Koh Samui, Koh Phangan and Koh Phi Phi. Very remote islands, and boat trips between them, can lose signal for a while.
Can I use Grab with a data-only eSIM?
Yes. Grab runs over mobile data. If it sends a text to confirm your account, it arrives on your UK number as normal, because your UK SIM stays in your phone.