Thailand remains the long-haul favourite for European travellers: the streets and temples of Bangkok, island hopping in the south, the mountains and elephants around Chiang Mai. And if there's one country where your phone runs your entire trip, it's Thailand. Taxis, translation, booking boats: it all happens through apps. Roaming through your provider back home, however, is painfully expensive, because Thailand is far outside the EU. That's why an eSIM for Thailand has become pretty much standard travel gear.
In Thailand, everything runs on your phone
Anyone who's been there knows: without mobile data, you're sidelined in Thailand.
- Grab for taxis and food. Southeast Asia's ride app. Fixed prices, no haggling, and the driver finds you via GPS. Only works with data.
- Translation. Reading Thai isn't an option for most of us. With a translation app you scan menus and signs straight off your screen.
- Maps, everywhere. Bangkok is enormous, and on the islands you want to know where that one beach or viewpoint is.
- Booking boats, buses and trains. Tickets for the ferry to Koh Phangan or the night train to Chiang Mai are booked online, often same-day.
- Staying in touch with home. Video calling from the beach is effortless on the networks there.
And those networks are genuinely good. Thai providers like AIS and True offer excellent 4G and 5G, often faster in the cities than what you're used to at home. Coverage on the inhabited islands is generally solid too: Koh Samui, Phuket, Koh Phangan and Koh Tao are all well connected.
Roaming or a local SIM? Both are a hassle
Roaming through your home provider is not a serious option for Thailand. The country falls into the expensive world zone: small day passes at steep prices, and some providers charge per MB. Over a three-week trip, that gets completely out of hand.
Buying a local SIM card in Thailand is possible. Bangkok's airports have provider counters and the packages aren't expensive. But after a twelve-hour flight you're standing in a queue with your passport for the registration, when you could be heading to your hotel. And if your phone only takes one physical SIM, your own card has to come out, so you miss texts from your bank and other services.
With an eSIM you install your Thai data bundle at home on the sofa, using a QR code. Your own number stays active for texts and WhatsApp, and as soon as you land at Suvarnabhumi or Phuket you switch on data roaming for the eSIM. Online before you're off the jet bridge.
How much data do you need for Thailand?
Thailand trips tend to be long: two, three or four weeks. That changes the maths compared to a week in Spain.
| Trip | Estimated usage |
|---|---|
| 2 weeks, mix of city and beach | 8-12 GB |
| 3 weeks backpacking | 12-20 GB |
| 4 weeks or longer | 20 GB or unlimited |
A good rule of thumb is 1 GB per travel day: slightly above the average user, so most people are covered. Heavy on Grab, video calls and TikTok? Size up, or go unlimited. The data calculator works it out precisely for your trip in half a minute, and our data guide breaks down what each app actually consumes.
How to set it up
- Compare the eSIM bundles for Thailand and pick the one that matches your trip length.
- Install the eSIM at home using the QR code you receive by email right after ordering.
- Activate on arrival: turn on data roaming for your eSIM profile, and you're online.
Your phone needs to support eSIM (almost all devices from around 2019 onwards) and be unlocked, which most phones bought in Europe already are.
Tips for the road
- Download offline maps of the areas you're visiting. On boat trips and in the mountains, the signal can drop.
- Use your hotspot when travelling as a pair: sharing one large bundle is often cheaper than two small ones.
- Set photo backups to wifi-only. Four weeks of holiday photos will quietly drain your bundle otherwise.
- Out of data? Our bundles are prepaid, so there's never a surprise bill. Top up straight from your account, even from a hammock on Koh Tao.
FAQ
Does the eSIM work on the islands? Yes. Coverage on the inhabited islands is generally fine. Only at sea and in very remote areas can the signal drop.
Can I install my eSIM before I leave? Yes, that's exactly the point. Install at home on wifi, activate once you arrive in Thailand.
Do I get 5G in Thailand with an eSIM? Where 5G is available, you can usually just use it. It costs nothing extra.
Conclusion
Thailand is a destination where your phone travels as hard as your backpack. The networks are excellent, but roaming is expensive and a local SIM costs you time and your own number. With an eSIM you're online from the moment you land, at a price that suits a trip measured in weeks rather than days.
Heading to Thailand? Compare the eSIM bundles for Thailand and sort your internet before you fly.