Asia · eSIM guide
Best eSIM for Thailand
- From
- $6.99
- Networks
- AIS
- Setup
- 3 min
- Queue
- None
Thailand has some of the cheapest mobile data in Asia, and travel eSIMs here are priced accordingly, 10GB for under $10 is normal. The airport AIS booths at Suvarnabhumi are decent value too, but why queue at 1 a.m. when the eSIM is already installed?
★ Our pick · Boarding pass
RoamSignal Air
Carrier
Saily
Destination
Thailand
Data
5GB
Validity
30 days
Boarding
Before takeoff
Queue
None
Best for short trips, and the lowest price we found for Thailand.
Thailand eSIM plans compared
Sorted by price. Indicative pricing, providers run sales constantly, so the checkout price is sometimes even lower.
eSIM vs roaming vs airport SIM in Thailand
The three ways travelers get data in Thailand, priced for a typical two-week trip. Carrier roaming bills per day, so its cost scales with your trip; an eSIM is a one-time purchase; airport SIM counters price for a captive audience that just landed tired.
How much data do you need in Thailand?
Two taps, honest answer, based on real usage patterns, not upselling.
You'll use roughly 3GB in 7 days of normal use.
Best fit: Saily, 5GB / 30 days at $6.99
View this plan at SailyWhich network will your Thailand eSIM use?
Travel eSIMs don't build towers, they roam on Thailand's existing mobile networks: AIS, dtac, TrueMove H. This matters more than the provider's brand name, because two eSIMs at the same price can ride very different networks. Before buying, check the plan's “network” or “coverage” line - every provider lists it, and match it against where you're actually going. Signal strength in the capital says nothing about the coast, the mountains, or the islands.
Speed-wise, travel eSIMs in Thailandget 4G LTE as the floor and 5G where the local network offers it, usually at no extra cost. Some budget plans deprioritize traffic at peak hours; if a deal looks too cheap, that's often the quiet trade-off.
What to know before you land in Thailand
- AIS has the strongest island coverage, if you're heading to Koh Phangan, Koh Tao or the Similans, pick an eSIM that uses AIS.
- Grab (Thailand's Uber) is data-hungry and essential. Keep 200-300MB per day spare for rides, food delivery and translation.
- 5G is live in Bangkok, Chiang Mai and Phuket on all three networks and most travel eSIMs now include it at no extra cost.
Which Thailand plan fits your trip?
Short trip / light user
A weekend or a stopover needs less than people think, maps, messages and ride apps fit in 1-3GB. Saily 5GB at $6.99 is the right-sized buy.
Two weeks+ / normal user
Navigation, social, translation and photo backup add up. Nomad 20GB at $15.00gives headroom without paying for unlimited you won't touch.
Heavy user / remote work
Video calls and hotspotting drain fixed plans fast. Holafly unlimited (15 days, $44.90) removes the data meter, check its hotspot policy first.
Installing your Thailand eSIM: the 3-minute version
- 1Buy the plan and scan its QR code at home on Wi-Fi, installation needs internet.
- 2Turn data roaming ON for the eSIM(that's how travel eSIMs work, it costs nothing extra) and OFF for your home SIM.
- 3Land in Thailand, set the eSIM as your data line, give it two minutes to find AIS.
Full walkthrough with troubleshooting: how to install a travel eSIM before you fly. New to eSIMs entirely? Start with what an eSIM actually is.
Thailand city guides
Coverage, airport arrival tactics and data budgets, city by city.
eSIM in Bangkok
Blanket 5G from all three networks across greater Bangkok, the BTS Skytrain, MRT subway (full underground coverage), Chao Phraya express boats, and the sprawling suburbs. Chatuchak market's 15,000 stalls have signal in every alley; you'll need it to find your way out.
eSIM in Phuket
Strong 4G/5G along the entire west coast beach strip, Patong, Kata, Karon, and Phuket Town on all networks, with AIS clearly strongest. Boat trips toward Phi Phi and Phang Nga Bay hold AIS signal surprisingly far offshore. The island's jungle interior roads drop to 3G in patches.
eSIM in Chiang Mai
Full coverage inside the old city and Nimman's café district on all networks. Doi Suthep temple keeps 4G at the summit. Further out, Doi Inthanon national park, the Samoeng loop, Pai road, AIS holds usable signal where dtac and True fade to nothing between villages.
Thailand eSIM, your questions, answered
Which network is best for the Thai islands?
AIS, clearly. dtac and True are fine in Bangkok and Chiang Mai, but on smaller islands like Koh Lipe or Koh Chang, AIS keeps a signal where the others drop to EDGE.
Is 10GB enough for two weeks in Thailand?
For most people, yes, with hotel Wi-Fi for evening streaming, 10GB covers maps, Grab, social media and translation comfortably. Skip it only if you plan to hotspot a laptop daily.
Do Thai eSIMs work in Laos or Cambodia side trips?
Country-specific Thai eSIMs don't. If you're doing the Bangkok-Siem Reap-Luang Prabang loop, buy a Southeast Asia regional eSIM instead, Airalo and Nomad both sell them.
