How to Buy a SIM Card in Bangkok
Buy a prepaid SIM card at the airport arrival hall, any 7-Eleven, or mobile phone shops throughout Bangkok. Tourist SIM packages with data and calls cost 200-600 baht and can be activated immediately with your passport.
- Choose your carrier. AIS, TRUE, and dtac are the three main networks. AIS has the best coverage overall. TRUE offers good tourist packages. dtac is cheapest for data-heavy users.
- Pick your location. Airport counters in arrival halls offer tourist packages but cost more. 7-Eleven stores are everywhere and sell basic SIM cards. Official carrier stores provide full service and English support.
- Bring your documents. You need your passport for registration. Some locations accept a photo of your passport, but bring the original to be safe.
- Select a package. Tourist SIM cards come with preset data allowances. Popular options: 8-day packages with 6GB (299 baht), 15-day with 15GB (599 baht). Regular prepaid starts at 49 baht for the SIM plus top-ups.
- Get it activated. Staff will cut the SIM to size, insert it, and activate service. The process takes 5-10 minutes. Test calling and data before leaving the store.
- Download the carrier app. Install your carrier's app (myAIS, TrueID, or My dtac) to check balance, buy add-ons, and manage your account in English.
- Will my US/European phone work?
- Most modern smartphones work in Thailand, but check that your phone is unlocked before traveling. iPhones and major Android phones typically work fine.
- Can I keep my home number for WhatsApp?
- Yes, WhatsApp will continue working with your original number as long as you don't re-verify with the Thai number. Just use the Thai SIM for local calls and data.
- What if I run out of data?
- Top up through the carrier app, at any 7-Eleven, or carrier store. Data add-ons typically cost 50-200 baht depending on the amount.
- Do I need to return the SIM card?
- No, prepaid SIMs don't need to be returned. Just dispose of it normally when you leave Thailand.