Thailand's mobile infrastructure is excellent for a tourist — AIS, TrueMove H, and DTAC blanket Bangkok, Phuket, Chiang Mai, and the major islands with 4G/LTE, and 5G is live across most urban zones. A Thailand eSIM is the fastest way online: physical SIM queues at Suvarnabhumi arrivals can run 30+ minutes in peak season, and tourist booths charge 2–3× the local retail rate. AskHeidi delivers instantly so you're navigating Grab, Google Maps, and Line before you clear passport control.
Best time to visit: November–February (cool, dry)
Networks in Thailand
AskHeidi eSIMs in Thailand connect to Maew via the Airalo Partners Network. The specific carrier is shown on each plan below.
Popular destinations in Thailand
Coverage provided by
What you get with every plan
How it works
Three steps. No store. No swapping.
What travelers say
“Used it in Japan for 2 weeks. Setup took literally 1 minute. Flawless 4G the entire trip.”
“Way cheaper than my carrier's roaming pass. Paid $12 for my whole Europe trip. Speeds were top tier.”
“Scanned the QR code at the airport, connected before I even got through customs. Magic.”