Prices in pounds · O2 prices checked 6 November 2026
O2 roaming in Thailand vs a travel eSIM
In Thailand, O2 uses its O2 Travel 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
O2 vs eSIM in Thailand: 3, 7 and 14 days
O2’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
O2 roamingGraba SIM eSIM
| Trip | O2 | Graba SIM eSIM | Difference |
|---|---|---|---|
| A long weekend3 days | £21.00£7 a day × 3 | £6.255GB, 30 days | The eSIM is £14.75 less |
| A week7 days | £49.00£7 a day × 7 | £6.255GB, 30 days | The eSIM is £42.75 less |
| A fortnight14 days | £98.00£7 a day × 14 | £9.7510GB, 30 days | The eSIM is £88.25 less |
What’s included: O2: unlimited calls, texts and data, at up to 2 Mbps. Graba SIM: data only, prepaid; your O2 SIM stays in your phone for calls and texts. Graba SIM prices are live; O2 prices checked 6 November 2026.
Sources: O2 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 O2
- Cambodia (side trips to Siem Reap for Angkor Wat): O2 charges Standard rates.
- Malaysia (Langkawi and Penang): O2 charges £7 a day.
- Laos (the slow boat to Luang Prabang): O2 charges Standard rates.
What you get for the money
O2 Travel Bolt On
- £7 a day, charged only on days you make a call, send a text or use data. Receiving calls and texts doesn’t trigger it.
- Calls to the UK and within the destination are included; calls to other countries are not.
- O2 Travel starts a 24-hour charge the first time you call, text or use data. Receiving calls and texts doesn’t start it.
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 O2 SIM stays on for calls and texts, so bank codes still reach you in Thailand.
O2 in Thailand: questions
How much does O2 roaming cost in Thailand?
£7 a day with the O2 Travel Bolt On: unlimited calls, texts and data, at up to 2 Mbps. For a trip, that is 3 days: £21.00 (£7 a day × 3); 7 days: £49.00 (£7 a day × 7); 14 days: £98.00 (£7 a day × 14).
Is a travel eSIM cheaper than O2 in Thailand?
It depends on the trip. Comparing O2’s lowest published option with a Graba SIM plan of about 0.7 GB a day: 3 days, the eSIM is £14.75 less; 7 days, the eSIM is £42.75 less; 14 days, the eSIM is £88.25 less. O2’s price also includes unlimited calls, texts and data, at up to 2 Mbps.
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.