Best eSIM for Thailand in 2026
THCompare eSIMs for Thailand: AIS for the islands, True for city 5G.
The cheapest eSIM for Thailand right now is Yesim — $0.49 for 500 MB over 1 days.
Prices updated 8/12/2026
Best for budget
Yesim$0.49
500 MB · 1d→
Best for heavy users
Yesim$3.48
∞ · 1d→
Best for short trips
Yesim$0.49
500 MB · 1d→
Best for long stays
Yesim$2.83
1 GB · 30d→
All plans for Thailand
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What you need to know about eSIMs in Thailand
Thailand now has two major carriers after dtac merged with TrueMove H in 2023: AIS, the country’s largest network, and True Corporation, holding roughly 33% of the market with strong urban 5G. AIS consistently wins speed tests and has more cell sites in rural and island areas, covering 95% of the population with 5G; True reaches around 93% nationwide 5G coverage.
For island-hopping — Koh Tao, Koh Lipe, Koh Chang, or the remote bays between boat crossings — AIS remains the more reliable choice. For Bangkok, Phuket, Koh Samui or Koh Phangan, both carriers work well. Budget 3–5GB per week for everyday use (maps, messaging, social media), and compare Airalo, Saily, Holafly and others above by real price-per-GB.
Frequently asked questions
- Which network should I pick for the Thai islands?
- AIS has more reliable coverage in remote bays and during boat trips between islands, especially for Koh Tao, Koh Lipe or Koh Chang. For Phuket or Koh Samui, both major carriers work well.
- What is the best eSIM for Bangkok?
- True offers strong urban 5G in Bangkok, and so does AIS. The choice matters more if your trip also includes rural or island areas, where AIS has the edge.
- How much data do I need for a Thailand trip?
- 3–5GB per week covers maps, messaging and social media. Plan for 10GB+ if you stream or tether.
- Can I keep my number with a Thailand eSIM?
- Yes. An eSIM adds a dedicated data line; your number, calls and WhatsApp keep working normally.
