Trying to choose between AIS, TrueMove and dtac in Thailand? There is an important change for 2026: True and dtac now operate on True Corporation’s fully integrated One Network, so the old three-way comparison is increasingly becoming a choice between AIS and the combined True/dtac network. I still compare all three names here because SIM and eSIM sellers continue to use them. However, what matters most for travelers is the network behind the plan and where in Thailand you will actually use it.
AIS vs TrueMove vs dtac: Which Thailand Network Should You Choose?
AIS is my best overall mobile network in Thailand for a varied trip. True is excellent in Bangkok and major tourist areas, while dtac-labelled plans should be judged by the actual True/dtac host network behind them.
My first choice for Thailand network coverage when the trip includes rural roads, ferries, islands, northern routes or long transfers.
Check the listed Thai host network before buying; I prefer an AIS-based option when available.
A strong AIS alternative in Bangkok, Chiang Mai, Phuket, Pattaya, Hua Hin, Koh Samui and other major tourist areas.
True and dtac now operate on an integrated network. I compare the host network and price, not the dtac name alone.
Need a more specific recommendation? Thailand eSIMs · islands & beaches · remote north · remote work
Table of Contents
AIS vs TrueMove vs dtac Comparison at a Glance
For most travelers, AIS is the safest coverage-first choice, while True is excellent in Bangkok and major tourist areas. In 2026, TrueMove and dtac are part of the same integrated True/dtac network, so check the actual host network before buying a Thailand SIM or eSIM.
| Network | Best for | Less ideal for | Verdict |
|---|---|---|---|
| AIS | Northern Thailand, islands, ferries, rural roads and long transfers. | Travelers choosing only by lowest price. | Best overall My first choice for a Thailand trip with lots of movement. |
| TrueMove / True | Bangkok, Chiang Mai, Phuket, Pattaya, Hua Hin and Koh Samui. | Remote mountain roads, smaller islands and coverage-first trips. | Best for cities Excellent where Thailand mobile coverage is already strong. |
| dtac-labelled plans | Budget Thailand eSIMs and simple city trips. | Choosing by the dtac name alone without checking the host network. | Check network first Now part of the wider integrated True/dtac network. |
What Independent Network Tests Say About AIS vs True in Thailand
There is an important difference between coverage and speed. Opensignal’s June 2025 Thailand report ranked AIS first for Coverage Experience, with a score of 8.5/10 compared with 7.4 for TrueMove H and dtac. nPerf’s 2025 mobile results, however, placed TrueMove H narrowly ahead of AIS for overall mobile-internet performance.
For travelers, that distinction matters more than declaring one network the universal winner. AIS leads on coverage, while TrueMove performs extremely well on overall mobile performance. That is why I choose based on the weakest part of the itinerary rather than headline speed: for a movement-heavy trip, I still prefer AIS.
Is AIS the Best Mobile Network in Thailand?
Yes. AIS is the best mobile network in Thailand for most travelers who plan to move beyond Bangkok and the main resort areas. Based on our experience using Thai mobile networks around the country, AIS is my safest coverage-first choice for long transfers, rural roads, ferries, islands, and mountain routes.
Its biggest strength is consistency. AIS coverage in Thailand matters most once you leave the easiest urban areas, where reliable data for Google Maps, tickets, transport apps, and messaging is more useful than headline 5G speeds.
I particularly prefer AIS for northern Thailand and other routes with long stretches between towns. True is highly competitive in Bangkok and major tourist destinations, but for a varied itinerary, AIS remains my first choice for overall Thailand mobile coverage.
My verdict: in an AIS vs TrueMove comparison, choose AIS if coverage is the priority; choose True if your trip stays mostly in Bangkok and other heavily covered tourist areas.
For route-specific advice around Pai, Mae Hong Son and Chiang Dao, see my remote north Thailand eSIM guide. For islands, use my Thailand islands and beaches eSIM guide.
(The coverage maps in this article come from nPerf.com; all rights reserved)
Is TrueMove Better Than AIS in Thailand?
Sometimes. In Bangkok and Thailand’s main tourist areas, I’ve found TrueMove close enough to AIS that I wouldn’t worry much about choosing between them. The difference matters more once I leave the easy urban routes.
- Bangkok: I’ve had no real issue relying on TrueMove around Sukhumvit, Silom, Chatuchak and other busy areas. For a city-focused trip, I’d happily use either True or AIS.
- Chiang Mai: True works very well around the Old City, Nimman and central Chiang Mai. Once I start heading farther out, though, I personally feel more comfortable on AIS.
- Phuket, Krabi and Koh Samui: In major resort areas such as Patong, Kata, Ao Nang, Chaweng and Lamai, TrueMove has always felt perfectly adequate for normal travel use.
Where I notice the difference is on rural roads, mountain routes and longer transfers. Those are the situations where I would rather have AIS coverage in Thailand, simply because I trust it more when I need Maps or messaging to keep working.
My verdict: if I were spending most of the trip in Bangkok and mainstream tourist areas, I’d be perfectly happy with TrueMove. For a more varied Thailand itinerary, I’d still choose AIS.
Is dtac Still Worth Choosing in Thailand?
Yes, but I no longer treat dtac as a completely separate network choice in Thailand. Since True completed the integration of dtac into its One Network in 2025, the old “AIS vs TrueMove vs dtac” comparison is less clear-cut than it used to be. I still see dtac listed on cheaper Thailand SIM and eSIM plans, so I always check the actual host network rather than buying based on the dtac name alone.
For a simple trip around Bangkok or the main tourist areas, I would have no problem using a good-value dtac-labelled plan. But if I were traveling through rural Thailand, taking ferries, or moving between less predictable areas, I would still personally choose AIS for the extra peace of mind.
My verdict: dtac can still be worth it for price, but in 2026 I would judge the plan by the network behind it, not the logo on the checkout page.
Check the Thai Host Network Before Buying a SIM or eSIM
This is the part I always check before buying. The eSIM brand matters less than the Thai network behind the plan, and that can change between providers or even between plans from the same provider.
Some providers clearly list AIS, True or dtac, while others only mention local network partners. If the host network is not obvious, I treat that as a reason to double-check before paying.
My rule is simple: AIS is my preferred network for a varied Thailand trip, while True or the integrated True/dtac network is perfectly fine for Bangkok and other major tourist areas.
For provider-by-provider recommendations, see my Thailand eSIM guide. If you work online while traveling, use my Thailand eSIM for digital nomads guide instead.
Best Mobile Network in Thailand for Most Travelers: My Recommendation
After years of using mobile data while traveling around Thailand, AIS is still the network I would choose for most trips. I trust it most when I’m moving between destinations and relying on my phone for Maps, tickets, pickups, and last-minute changes. True is an excellent alternative if your trip stays mainly in Bangkok and other major tourist areas.
If you are ready to buy, Nomad is a good place to compare Thailand eSIM plans. Check the Thai host network shown for the specific plan: I would prioritize an AIS-based option when available, while a True/True-dtac plan can make perfect sense for a more city-focused itinerary.
Thailand Mobile Network FAQs: AIS, TrueMove and dtac
Are TrueMove and dtac the same network in Thailand in 2026?
True and dtac are now part of the same integrated network following the completion of their One Network integration in 2025. I therefore no longer treat TrueMove vs dtac in Thailand as the old-style choice between two completely separate networks, even though both names still appear on some SIM and eSIM listings.
Is AIS or TrueMove better in Bangkok?
For normal travel use in Bangkok, I have found both AIS and TrueMove very reliable and would happily use either. AIS vs TrueMove matters more once your Thailand itinerary moves beyond heavily covered city and resort areas.
Do Thailand eSIMs use AIS, TrueMove or dtac?
It depends on the provider and the individual plan. I always check the Thai host network before buying an eSIM rather than assuming the brand at checkout tells me which network I will use. See my Thailand eSIM guide for the provider-by-provider comparison.
Is 5G speed or mobile coverage more important in Thailand?
For travel, I prioritize reliable Thailand mobile coverage over peak 5G speed. When I am using Google Maps, transport apps, tickets or messaging between destinations, a stable connection matters far more to me than winning a speed test in Bangkok.
Last Updated on 10/08/2026 by Panos
