How do you get a mobile phone number in Thailand in 2026?

Use official AIS, True, or dtac shops in Suvarnabhumi, Don Mueang, Chiang Mai, Phuket, and Krabi arrival halls, or mall stores in Siam Paragon, CentralWorld, Central Festival Chiang Mai, and Jungceylon. Staff copy your passport and activate tourist or regular prepaid packs in minutes, often with a photo or biometric check. Supermarket and 7-Eleven kits exist, but brand shops handle foreign passport registration more reliably when the kiosk system rejects a scan.

NBTC-linked rules cap how many SIMs a foreigner may register per operator (commonly three per brand). Tourist SIMs are typically capped around 60 days; topping up alone may not extend them. For longer stays, return to a shop with your passport to re-identify or move onto a longer prepaid product. AIS often leads coverage in the North and Isaan; True and dtac compete hard in Bangkok and tourist provinces. Travel eSIMs help on the BTS or MRT, but banking OTP and many local apps still prefer a Thai MSISDN after you open a bank account.

Ask for a Thai number that can receive SMS, not a data-only tourist SKU, if banks and PromptPay-linked apps are your next step. Keep the registration slip; some shops ask for it when you re-verify or port later.

If you are settling rather than visiting, ask for a standard prepaid Thai number instead of a short tourist SKU, and keep proof of registration. Update the line when you renew your passport. Some mall counters will not convert a dead tourist pack after the window closes; they issue a new prepaid line under a fresh registration slot instead, which burns one of your per-operator SIM allowances. Pair mobile data with condo fibre later under utilities, internet and transport. Residence and reporting steps also assume you answer Thai SMS: Paperwork after moving and Apply for a residence permit.

If you split time between Bangkok and Chiang Mai or Phuket, keep one Thai number rather than collecting tourist SIMs at every airport. Coverage on islands and mountain roads still varies by brand, so ask locals which network works on your soi before you lock a long prepaid plan.