Thailand eSIM

Choose the data allowance and validity that fit your trip, then compare the current options displayed on this page. The live price appears before checkout and may change when packages are updated. “Thailand eSIM” and “eSIM Thailand” describe the same travel data product.

Network support depends on the selected Thailand plan. Before purchase, check its listed local networks and whether 5G or 4G is offered for your device and stops. After arrival, choose the eSIM for mobile data and follow the device settings; availability varies by location and local network conditions.

On the main islands like Phuket and Koh Samui, and around the developed shore near Krabi, coverage varies by location and local network conditions. On the boats between islands, on open water and in remote bays, the signal can drop in and out. Download your maps and booking details before you board so you are not caught offline mid-trip. Plan around the gap rather than the destination: the crossing itself is usually the longest stretch without a usable signal, so anything you will need on the other side should already be on the device. If the group is splitting between boats, agree a time and a place instead of promising to message on arrival, and check the current schedule for the return crossing before you commit to a late one.

Do not infer cross-border coverage from the Thailand page name. Check the selected plan's listed destinations; if your route also includes Laos, Cambodia, Malaysia, or another country, compare a regional eSIM and verify every stop before purchase. Land borders and short flights both count. A day trip that crosses into a neighbouring country is a separate coverage question rather than an extension of the Thailand plan, and so is a stopover added on the way home, even one where the passport never leaves the airport.

Yes. With live data you can map the BTS Skytrain, time the next river boat along the Chao Phraya, and show a tuk-tuk driver exactly where you're headed. Coverage varies by location and local network conditions and is often more available in the city centre, which is where most of this getting-around happens. Underground rail sections, lifts and basement concourses are where a live search fails most often, so settle the route above ground and keep the destination written out in a form a driver can simply read. For a late return, check the current schedule for the last services on the day itself instead of relying on a timetable remembered from an earlier trip.

Install the Thailand eSIM over Wi-Fi a day or two before flying and save the setup details offline. After landing at Suvarnabhumi, select it for mobile data and follow the plan instructions. Installing early does not start validity; it does not begin until the eSIM first connects to a supported mobile network in Thailand.

Yes. The eSIM is a separate data line, so your usual number stays active for calls and texts over Wi-Fi or its own roaming, while the eSIM handles your data. Hotspot sharing is free on every Horizon plan.

A Thailand eSIM uses whichever local networks the selected plan lists, so read that plan's own details rather than a general claim. 5G or 4G availability and connection timing depend on the plan, device, location and local network conditions. Pick a data size that covers your route from the city down to the islands, and install it by QR code before you fly, so there is nothing to sort out on arrival. There is no single answer that fits every itinerary: a week in Bangkok and the north loads a plan very differently from a fortnight of island-hopping. Compare the data amount, the validity and the exact destination list against the trip you are actually taking, and read the plan details rather than a label.

No. Horizon plans have no throttling. There is no daily limit that slows you down, so you can use your whole plan in one day if you need to. Your speed depends on the local network, your signal and how busy the network is. When your data allowance is used up, the plan stops rather than slowing down.

Yes. We always refund the full amount you paid when you request it, whether your eSIM is unused, partly used or fully used. There is no time limit for requesting a refund.