Thailand
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Thailand offers excellent mobile connectivity at some of the lowest data prices in the world. The three major carriers — AIS, DTAC, and TrueMove H — provide extensive 4G LTE coverage throughout the country, with 5G available in Bangkok, Chiang Mai, Pattaya, and Phuket.
Coverage is outstanding across all major tourist areas including Bangkok, Chiang Mai, Phuket, Krabi, Koh Samui, Koh Phangan, and Pattaya. Even smaller islands and northern hill towns generally maintain good 4G connectivity, though speeds may be slower in very remote mountain areas.
Thailand is one of the cheapest destinations for eSIM data, with plans starting from around $2.50. Average 4G speeds range from 20–60 Mbps, which is more than adequate for all travel needs.
Mobile Networks
Excellent 4G LTE coverage. 5G in Bangkok, Chiang Mai, Phuket.
Grab (Southeast Asia's rideshare app) requires mobile data. Have your eSIM active when you land at Suvarnabhumi or Don Mueang airport for instant booking.
Thailand's street food markets and smaller shops are increasingly cashless — mobile banking and QR payments work best with reliable data.
If island-hopping in the Andaman Sea, coverage is generally good on main islands (Phuket, Phi Phi, Lanta) but can be patchy on very small, undeveloped islands.
Download Google Translate's Thai language pack offline — it's invaluable for reading menus and signs outside tourist areas.
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