Quick Answer
AIS is Thailand’s largest mobile operator with 46 million subscribers and the strongest overall network performance. TrueMove H has 55 million subscribers after the True Corporation and DTAC merger, giving it the largest subscriber base and strong urban coverage. AIS leads on network quality. TrueMove H leads on subscriber count post-merger.
Side-by-Side Comparison
This table compares Thailand’s two dominant mobile operators after the True-DTAC merger reshaped the market.
| Feature | AIS | TrueMove H |
|---|---|---|
| Subscribers | 46 million | 55 million (post-merger) |
| Network Quality | Consistently top-ranked | Growing, integrating DTAC |
| 5G Coverage | Active in major cities | Active in Bangkok, expanding |
| Fiber Brand | AIS Fibre | True Online |
| Technology | 4G LTE, 5G, FTTH | 4G LTE, 5G, FTTH |
| Background | Independent, stable | True Corp + DTAC merged |
| Strength | Network quality, 5G | Subscriber scale, urban density |
Test AIS speed | Test TrueMove H speed
Speed Comparison
AIS has been Thailand’s top-ranked mobile network in Opensignal and Ookla testing for several years. Its 5G and 4G speeds consistently lead Thai operators. AIS invested early in 5G spectrum and network densification.
TrueMove H is integrating the former DTAC network after the 2023 merger. The combined spectrum holdings give TrueMove H strong capacity potential. However, network integration takes time. Some areas may experience inconsistent performance during the transition.
Both operators offer FTTH fiber broadband. AIS Fibre and True Online deliver up to 1 Gbps. Home broadband performance is similar between the two.
Run a speed test to see which network performs better at your location.
Coverage
TrueMove H’s 55 million post-merger subscriber count gives it the largest user base in Thailand. The combined True + DTAC network has strong coverage in Bangkok, Chiang Mai, Phuket, and other urban centers.
AIS at 46 million subscribers has built a strong nationwide network. AIS traditionally leads on rural and provincial coverage. Outside Bangkok, AIS signal often outperforms TrueMove H.
The True-DTAC merger gives TrueMove H more spectrum and towers, but full integration is ongoing. Some rural DTAC towers may still operate on separate infrastructure.
Which Should You Choose?
AIS fits users who want proven network quality and strong coverage across Thailand. If you travel between provinces or live outside Bangkok, AIS’s consistent performance matters. AIS has led Thai network rankings for years.
TrueMove H fits Bangkok-based users and those in the True ecosystem (True Online fiber, True Vision TV). The post-merger network has the spectrum to deliver strong urban performance. True’s bundled packages for mobile, fiber, and TV can save money.
Both are good networks. Thailand’s mobile market is competitive, with minimal coverage gaps in populated areas.
Summary
AIS leads on network quality and provincial coverage. TrueMove H leads on subscriber count (55M) and urban density after the DTAC merger. Both offer 5G and fiber broadband. AIS is the safer pick for overall quality. TrueMove H is strong for bundled urban services.
Test your connection at Kencang speed test and see the Thailand internet overview for more market data.
Last Updated: March 28, 2026 Data Sources: NBTC Thailand, Opensignal Thailand report, operator filings