AIS nationwide 4G and 5G network coverage across Thailand (2026)

AIS Review: Coverage And Mobile Performance In Thailand 2026

AIS operates Thailand’s largest mobile network with over 45.7 million subscribers, nationwide 4G reach above 98 percent, and the country’s widest 5G footprint.

Introduction

Advanced Info Service Public Company Limited operates as Thailand’s largest mobile network operator, serving approximately 45.7 million subscribers and holding over 44 percent mobile market share as of 2025.

AIS delivers the most extensive nationwide coverage, the fastest average mobile speeds in urban Thailand, and the widest commercial 5G deployment, according to OpenSignal and Ookla reports published in 2024.

This review examines AIS network coverage, speed performance, customer service, digital services, competitive positioning, and key advantages compared with TrueMove H and DTAC, helping you understand where AIS leads and where trade-offs exist.

You can also compare AIS with TrueMove H and DTAC for alternative mobile options in Thailand.

Network Coverage And Performance

AIS covers over 98.5 percent of Thailand’s population with 4G and more than 85 percent with active 5G service. Coverage data is confirmed by OpenSignal Thailand Mobile Experience Report, published December 2024.

Coverage remains strongest in urban and coastal regions including Bangkok, Chiang Mai, Phuket, Chonburi, and Khon Kaen, while rural northern and border provinces maintain consistent LTE availability.

4G And 5G Availability

AIS operates nationwide LTE and a multi-band 5G network using both low-band and mid-band spectrum for coverage depth and speed consistency.

LTE operates primarily on Bands 1, 3, 8, 28, and 41, while 5G uses 700 MHz, 2600 MHz, and 26 GHz millimeter-wave frequencies, according to NBTC licensing records published 2024.

Speed Test Results

AIS delivers average mobile download speeds above 65 Mbps and upload speeds above 18 Mbps across major Thai cities, according to Ookla Speedtest Intelligence Thailand Report published Q4 2024.

AIS mobile speed performance across major Thai cities

Learn more in our Thailand 5G network performance guide.

Customer Service And Support

AIS operates omnichannel customer support with average response times under 5 minutes for digital channels. Satisfaction data reflects national consumer surveys published 2024.

• Phone Support: 1175, available daily 8:00 AM – 10:00 PM (ICT)

• Live Chat: 24/7 via myAIS app with under 5-minute response

• Physical Stores: Over 2,000 AIS shops nationwide, including Bangkok, Chiang Mai, Phuket, and Udon Thani

• Mobile App Support: In-app ticketing and chat, rated 4.6 stars on iOS and 4.5 stars on Android

• Email Support: contact@ais.co.th, average response within 24 hours

AIS customer service channels and accessibility

Compare support quality in our Thailand carrier support comparison.

Additional Services And Features

AIS provides a mature ecosystem of digital and international services for long-term residents, travelers, and enterprise users.

• International Roaming: Coverage in over 100 countries across Asia, Europe, and the Americas

• Mobile App Features: Data usage tracking, bill payment, plan management, roaming activation, rewards wallet, and service chat

• eSIM Support: Available for iPhone XS and newer, Samsung Galaxy S20 and newer, and Google Pixel devices

• Rewards Program: AIS Points with redemption for data, partner discounts, and lifestyle services

• 5G Device Support: Full compatibility with NSA and SA 5G smartphones sold in Thailand

AIS mobile app interface and core features

See our eSIM activation guide for compatible devices and setup steps.

AIS Pros And Cons

Advantages

• Nationwide Coverage: Over 98.5 percent population reach, including rural provinces, according to OpenSignal 2024

• Fast Urban Speeds: Average city download speeds exceeding 65 Mbps, based on Ookla Q4 2024

• Extensive Retail Network: More than 2,000 physical stores nationwide

• Mature Digital Ecosystem: Integrated payments, rewards, roaming, and support in a single app

Disadvantages

• Premium Plan Positioning: Core plans are positioned above budget-focused MVNO offerings

• Congestion In Dense Areas: Peak-hour slowdowns reported in central Bangkok business districts

• Complex Plan Structure: Multiple plan tiers require careful selection

AIS Vs Competitors

Thailand’s mobile market is dominated by three national operators, with AIS leading in coverage depth, 5G reach, and subscriber volume.

Thailand mobile carrier comparison across key metrics

AIS suits users prioritizing coverage stability and 5G reach, while TrueMove H focuses on bundled media services, and DTAC targets simplified plans.

Conclusion

AIS remains Thailand’s most reliable mobile carrier for nationwide coverage, strong 5G availability, and digital service integration.

Explore alternatives in our Thailand mobile carrier directory or learn how to choose the right option in our carrier selection guide.

Last Updated: February 2026

Sources:

1. OpenSignal Thailand Mobile Experience Report, December 2024

2. Ookla Speedtest Intelligence Thailand, Q4 2024

3. NBTC Thailand Spectrum Licensing Records

4. AIS Official Website