How do I activate a Thailand eSIM?

Activation is digital. After purchase you get a QR code; on your phone go to Settings, Cellular, Add eSIM, and scan it. Do this on Wi-Fi just before you depart or on arrival.

Do international eSIMs bypass Thailand's biometric SIM registration?

Yes. Because they are roaming profiles from another country's operator, they are not subject to Thailand's NBTC registration, so you do not show a passport or do a biometric liveness scan.

How can I be sure my eSIM uses the AIS network?

Check the plan details before buying. Airalo labels its Maew plan as AIS. Saily and Roamless are multi-network and connect to the strongest signal, usually AIS outside major cities. A provider listing only dtac or TrueMove H is not ideal for islands or mountains.

What is the best eSIM for Koh Phangan?

Choose an eSIM that uses the AIS network. Airalo's Maew plan, Saily, or Roamless are the most reliable for Srithanu, Haad Rin, and the island interior.

Can I get a Thai phone number with an eSIM?

Most travel eSIMs are data-only and do not include a +66 number, which can be an issue for Grab or local banking OTPs. A dedicated local SIM is the workaround if you need a Thai number.

Best eSIM for Thailand Long-Stay (2026): AIS & 60-Day Cliff