Getting a Thai Phone Number: SIM Cards, Contracts & Registration

A Thai phone number is essential for long-term living — it is needed for banking apps, delivery services, LINE (Thailand's primary messaging app), and two-factor authentication. Getting a prepaid SIM: available at Suvarnabhumi and Don Mueang airports, all 7-Eleven stores, and dedicated phone shops. You need your passport — Thai law requires SIM registration with a government ID. The main networks: AIS, True (merged with DTAC), and DTAC. Tourist SIMs cost ฿199–299 for 30-day packages with 15–30 GB data. For residents, upgrading to a postpaid contract (monthly plan, ฿200–600/month for unlimited data plus calls) provides better value and a permanent number. The Thai phone number format: 10 digits, starting with 06, 08, or 09 for mobile numbers. LINE is the primary messaging and calling app in Thailand — nearly all Thais and most businesses use it, and having a Thai number enables full LINE functionality including payment and business accounts. For banking: Thai banks require a Thai mobile number for online banking and OTP verification — get your SIM before attempting bank account setup. Number portability between networks is straightforward through the MNP system if you want to switch providers while keeping your number. Emergency SIM top-ups are available at any 7-Eleven — bring your number and buy top-up cards or use the app.