Thai SIM cards are cheap and easy — here's exactly what to buy and where to get it.
Easiest option: AIS, DTAC, and True Move H counters in arrivals at both Suvarnabhumi and Don Mueang — open 24 hours, English-speaking staff.
Tourist SIMs: 299–599 THB for 7–30 days with 30–100 GB data, unlimited calls within Thailand — exceptional value.
AIS has widest coverage; True Move H best in cities; DTAC slightly cheaper but smaller network — all adequate for Bangkok.
If your phone supports eSIM, buy online before departure (Airalo, Klook) and activate on landing — slightly more expensive but zero queue.
Bangkok maps use about 50 MB/day; video calls 300 MB/hour; 10 GB is plenty for a 2-week visit if you use hotel WiFi for streaming.
