eSIM for Thailand: what actually works
A researched, up-to-date guide to mobile data in Thailand. Operators, coverage, prices, and when a local SIM beats us.
Choose your eSIM Thailand according to the length of your stay and your expected data use. 5 GB is generally enough for maps, messaging and social media, while video streaming and hotspot use require more data. The plans shown range from 3 to 50 GB and start at $3.90. They are fully refundable within 30 days provided the eSIM has not been used on a network at the destination. The activation link is sent by email after purchase.
Thailand eSIM plans
Prices in USD. Instant QR activation. Pick your data, land connected.
Clear data. Clear price.
Drift plans show a fixed data allowance, validity period and final price before checkout.
About “unlimited” plans: Plans marketed as unlimited, including Holafly plans, may still be subject to local network Fair Usage Policies (FUP) and temporary speed reductions after heavy use. Unlimited data does not always mean unlimited full-speed data.
Coverage in Thailand
In 2026, 5G reaches more than 95% of Thailand's population. Both AIS and True run 5G across Bangkok, Chiang Mai, Phuket, Pattaya and the main islands, with real-world speeds well above what any traveller needs. The old worry about finding a signal is mostly gone. What still varies is congestion in crowded tourist spots at peak hours, and reliability offshore and in remote national parks, where AIS holds the edge.
Local operators
AIS
5G/4Glocal eSIM availableThe biggest carrier, with the widest geographic, island and rural coverage and the most 5G towers. The best choice once you leave Bangkok.
True (TrueMove H / dtac)
5G/4Glocal eSIM availableStrong and often fastest in the cities. The dtac brand is being folded into True, and existing dtac eSIMs now route through the True network. Still catching up on some islands and remote provinces.
⚠️ An eSIM that covers Thailand keeps working on arrival, with no SIM swap needed. For Thailand-only trips you connect the moment you land.
Networks available by plan
The network depends on the plan you choose. These are the published operators for the first six plans currently sold.
| Plan | Published operators |
|---|---|
| 3 GB · 15 days | TrueMove H, dtac |
| 5 GB · 30 days | TrueMove H, dtac |
| 10 GB · 30 days | TrueMove H, dtac |
| 20 GB · 30 days | TrueMove H, dtac |
| 50 GB · 10 days | TrueMove H |
Buying a local SIM instead
Where to buy: Airport arrival counters and any 7-Eleven
Price: 8 to 15 USD
An AIS or True tourist SIM is cheap and easy if you stay several weeks. For shorter trips, a travel eSIM saves you the queue and the passport registration.
How much data for Thailand
What to expect by trip type.
| Itinerary | Days | Data needed |
|---|---|---|
| City break (Bangkok) | 4 to 7 | 3 to 5GB |
| Island hopping | 10 to 14 | 5 to 10GB |
| Long backpacking trip | 30 | 10 to 20GB |
The verdict
The verdict
Our eSIM wins when: you want to land connected for a trip of a few days to a couple of weeks, without queuing or swapping a SIM.
A local SIM wins when: you stay a month or more and want the lowest possible price per GB.
On the competition: Unlimited plans only pay off if you stream heavily. Since 5G is everywhere in Thailand in 2026, most travellers never come close to needing unlimited, and a capped data pack is the smarter buy.
Bottom line: For most travellers our eSIM is the simplest call: land connected, no airport queue. For very long stays, a local AIS pack wins on price per GB.
Thailand eSIM FAQ
Does an eSIM work at Bangkok Suvarnabhumi or Phuket airport on arrival?
Yes. Activate before you fly and it connects to AIS or True the moment you land, before you reach immigration. Note you now also need to complete the Thailand Digital Arrival Card online before arrival.
Is 4G or 5G better in Thailand in 2026?
It rarely matters anymore. 5G covers over 95% of the country and 4G speeds were already more than enough for maps, calls and streaming. Pick a plan on coverage where you are going and on price, not on 4G versus 5G.
AIS or True for a tourist?
AIS if you are leaving the cities, island hopping or heading north; it has the best island and rural reach. True is excellent if you stay in Bangkok and the major resort towns. The dtac brand no longer matters as a separate choice; it is now part of True.
Is an eSIM cheaper than a local Thai SIM?
For short trips, often yes once you count the airport markup and the hassle. For long stays, a local AIS pack wins on price per GB.
Cities & islands in Thailand
Local coverage, the best network by area, and the same plans that work nationwide.
Ready to sort your Thailand eSIM?
Pick the plan that fits your trip to Thailand, or work out exactly how much data you need first.