How to Use an eSIM in Thailand

Thailand is one of the most popular travel destinations in Southeast Asia — and staying connected there has never been easier thanks to travel eSIMs.

Network coverage in Thailand

AIS and DTAC are Thailand's two major carriers, with excellent coverage across Bangkok, Chiang Mai, Phuket, and Koh Samui. Island coverage can be patchy in remote areas, but tourist spots are generally well covered.

Best areas to stay connected in Thailand

• Bangkok — excellent 4G/5G throughout the city
• Chiang Mai — strong coverage in the old city and mountains
• Phuket — good on the main island, weaker on smaller islands
• Koh Samui — reliable in towns, limited in rural areas

How much data do you need?

For most holiday travellers, 3–5 GB will last two weeks in Thailand if you're relying on hotel Wi-Fi for heavy use. If you're working remotely or using data-heavy apps constantly, go for 10 GB or unlimited.

Can I use eSIM in Thai temples and rural areas?

Yes — eSIM connects to whichever network has the best signal in your location. In most tourist areas, you'll have solid 4G. Remote trekking areas in northern Thailand may have limited coverage regardless of provider.