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Why an eSIM?
Thailand isn't part of EU roaming rules. Without a travel add-on, mobile data gets expensive fast. An eSIM with a fixed data allowance is the simplest option for Bangkok, the islands and round trips.
- Grab and maps: ride-hailing like Grab, maps and translators are things you use constantly – little works without data.
- Islands: coverage is good on the big islands, but can be patchy on small islands and boats.
How to set it up
- Buy before you leave and install it via QR code or app – ideally on your home Wi-Fi.
- Activate on arrival: with many providers the plan starts with your first connection in the country.
- Turn on data roaming for the eSIM, off for your normal SIM – your number stays reachable for calls and texts without data charges.
- Check your phone: it must support eSIM and must not be carrier-locked.
Good to know
- Entry: before arrival you must complete the Thailand Digital Arrival Card (TDAC) online. Check the latest rules with your government – see also our entry guide.
- Sockets: Thailand has mixed sockets; Euro flat plugs often fit. A universal adapter is still a good idea.
- Cash: at markets and small food stalls you usually pay cash – more in our cash guide.
Providers
AdSaily*eSIM data plans for many countries and regions, set up in the Saily app.Go to provider →
AdAiralo*Large eSIM provider with country, regional and global plans.Go to provider →
AdYesim*eSIM plans for single countries and whole regions.Go to provider →
How Voynera helps
Voynera's arrival briefing shows whether roaming charges apply at your destination and links to suitable eSIM offers.
As of November 2026 · without guarantee