How Does SIM Card & Internet Work in Thailand?
Last verified: 2025-06 · Asia
1The Quick Answer
Tourist SIMs from AIS or TrueMove cost 299–499 baht at the airport and give you 15–30 days of data with excellent coverage in cities and resort areas.
2What You Need to Know
Thailand has three main mobile networks: AIS, DTAC (now merged into TrueMove H), and TrueMove. All three sell tourist SIM cards at Suvarnabhumi and Don Mueang airports upon arrival, and at convenience stores throughout the country. Tourist SIM packages typically cost 299–499 baht and include unlimited or high-speed data for 15–30 days. Coverage is excellent in Bangkok, Chiang Mai, Phuket, Koh Samui, and most resort areas. Signal can be patchy in jungle, mountain, and remote island areas. Airalo eSIM is a convenient option for those with compatible unlocked phones, allowing activation before departure.
3Practical Tips
Practical Tips
- 1Buy your SIM at the airport arrivals hall immediately — booths from AIS and TrueMove are clearly signposted
- 2AIS is generally considered to have the strongest rural and island coverage in Thailand
- 3If your phone supports eSIM, Airalo lets you activate a Thai data plan before you even board the plane
How does this compare?
SIM Card & Internet rules in nearby and similar countries:
Buy a tourist SIM or eSIM at the airport on arrival — data coverage is excellent nationwide.
Singapore has outstanding 5G coverage throughout the entire country, and tourist SIM cards are easy to buy at Changi Airport on arrival.
Get a Jio tourist SIM at the airport on arrival — it offers the best data value and nationwide coverage, and requires your passport for registration.
Traveling to Thailand?
You might also need:
Airalo eSIM
Instant eSIM for 190+ countries. Set up before you leave — no physical SIM card needed.
Pocket WiFi Rental
Unlimited mobile internet in your pocket. Rent a WiFi hotspot device for your entire trip.
SafetyWing Travel Insurance
Medical coverage for travelers worldwide. Covers emergency care, hospital stays, and evacuation.
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