Thailand SIM Card & eSIM Guide 2025: TrueMove H, AIS & DTAC Compared

Thailand has three real mobile networks — TrueMove H, AIS and DTAC — and all three cover Bangkok, Chiang Mai, Phuket and the main islands well. The real questions for a traveler are simpler: what does it cost, and can you skip the airport SIM counter? Here’s the 2025 breakdown.

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Thailand eSIM prices at a glance (2025)

Plan	Data	Validity	Price
TrueMove H eSIM	15GB	7 days	$8.90
TrueMove H eSIM	Unlimited	8 days	$18.90
TrueMove H eSIM	50GB	10 days	$11.90
TrueMove H eSIM	Unlimited	15 days	$37.90
TrueMove H eSIM	Unlimited	30 days	$47.90

These are Internet in Laos’ Thailand eSIM plans, pre-activated and delivered by email before you fly — install it on the plane, land, and you’re online. Physical prepaid SIMs from TrueMove, AIS and DTAC are sold at the airport and at 7-Eleven stores across the country for a broadly similar price range, but require showing your passport at the counter and manual activation.

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TrueMove H vs AIS vs DTAC

Carrier	City coverage	Islands & rural areas	Notes
TrueMove H	Excellent (4G/5G)	Strong on Phuket, Koh Samui and most tourist islands	Our eSIM runs on this network
AIS	Excellent (4G/5G)	Widely considered the strongest rural/mountain coverage	Often the pricier local SIM at the counter
DTAC (merged into True)	Very good (4G/5G)	Solid in cities, more variable outside them	Now operates jointly with TrueMove under the True group

For a short trip covering Bangkok, Chiang Mai and the main islands, all three perform similarly — you won’t notice a difference. If your route heads deep into the northern hills or remote national parks, AIS has the best reputation for rural reach, but TrueMove H (our network) is a safe, well-covered choice for the vast majority of tourist itineraries, including Phuket, Krabi and Koh Samui.

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Why buy an eSIM instead of a local SIM

• Skip the counter. No passport registration queue at the airport or a 7-Eleven — the eSIM is pre-activated and tied to your order, not a physical card.
• Online before you fly. Install the QR code from your hotel room days before departure; data turns on automatically the moment you land in Thailand.
• No SIM swap. Keep your home SIM in the phone for your existing number and calls; the eSIM handles data on a second line.

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Combining Thailand with Laos, Vietnam or Cambodia

Doing a longer Southeast Asia loop? If your route covers Thailand, Vietnam and Cambodia, one regional eSIM can cover all three on a single data balance — see our Thailand, Vietnam & Cambodia loop guide. Adding Laos to the mix needs a separate Laos-capable plan, since Thailand and Laos aren’t on the same regional bundle — see our guide to eSIMs for Laos and Thailand for how to handle both without overpaying.

Ready to go? Choose your Thailand eSIM.