Thailand SIM card for tourists 2026: airport or eSIM?
Where to buy a SIM card in Thailand, what the counter asks for, coverage in Bangkok, and when an eSIM installed before you fly is the better buy.
Short answer: A tourist SIM card in Thailand is bought at a counter after you land in Bangkok; a ONE eSIM plan for Thailand is installed at home on Wi-Fi, works the moment you land and leaves your own SIM and number in place. Both work in every city in this guide.
Landing in Bangkok and wondering whether to queue for a SIM card? This is how buying one works in Thailand in 2026, what the counter will ask you for, and when an eSIM bought before you fly is the better deal.
Where to buy a SIM card in Thailand
AIS and TrueMove H, the two big Thai networks, run tourist SIM booths in the arrivals halls at Suvarnabhumi, Don Mueang, Phuket and Chiang Mai. The staff take your passport, photograph you for the registration, swap the SIM and set the phone up for you. Tourist SIMs are sold by the number of days; 7-Eleven and the operators’ shops sell top-ups and ordinary prepaid SIMs in town.
Tourist SIM card or travel eSIM?
| SIM card in Thailand | ONE eSIM Our price | |
|---|---|---|
| Where you get it | Airport counter or a shop | On this site, in a minute |
| When it works | After the counter and the swap | The moment you land |
| Your home number | Out of the phone | Stays in for calls and texts |
| Paperwork | Often a passport and a form | None |
| Validity | Sized by the month | From one day; top up when you need |
| If it fails | Back to the shop | Refunded in full before installation |
An eSIM is a plan downloaded onto a phone that supports it, which is every iPhone since the XS and most Android flagships since 2020. You install it on Wi-Fi at home, keep the line switched off, and turn it on when the plane lands in Bangkok. The plan starts the first time it connects, not when you buy it.
Coverage in Bangkok, Phuket and Chiang Mai and beyond
Both a local SIM and a travel eSIM run on the same networks in Thailand, so coverage is about the operator, not the kind of SIM. Our plans name their operator and whether it runs 3G, 4G or 5G; each plan card shows its best generation. In Bangkok, Phuket, Chiang Mai, Pattaya and Krabi you will have a full signal from any of them.
FAQ: SIM cards and eSIMs in Thailand
- Do I need my passport to buy a SIM card in Thailand? Yes. Every Thai SIM card is registered to the buyer’s passport, and most counters take a photo too. A travel eSIM is bought before you go and needs no registration.
- Can I use Grab and food apps without a Thai number? Yes. Grab, Bolt and LINE MAN sign in with your home number, which stays active when your mobile data runs on a travel eSIM.
Before you fly
- Check your phone supports eSIM and is not carrier-locked (our device page lists every model).
- Buy the plan a few days before the trip and install it on home Wi-Fi; the QR code arrives by email in minutes.
- Keep the travel line off until you land, then turn it on with data roaming enabled for that line only.
- Leave your home SIM in for calls and texts; set the eSIM as the mobile data line.
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