Thailand eSIM
data from $2.29.

If you are searching for an eSIM Thailand solution, Slashtel offers data only plans from $2.29 for travellers heading to Bangkok, Phuket, Chiang Mai or the islands. You get data on TrueMove H, DTAC, CAT and AIS, with 5G available where those networks provide it. There is no local number and no calls or SMS, so you keep your home SIM active for bank codes.

Choosing an eSIM for Thailand

What matters most is coverage on the main Thai networks, enough data for your trip, a validity period that matches your stay, hotspot support and installing the eSIM before you fly. If you are wondering what the best eSIM for Thailand looks like for your trip, focus on those five points rather than on marketing claims.

Coverage comes first. Thailand has several mobile networks, and your eSIM connects to them automatically when you arrive. You do not pick a network manually. The main networks listed for this plan are TrueMove H, DTAC, CAT, AIS and True Move. In cities such as Bangkok and Chiang Mai you will usually be within reach of several of them, and on the islands coverage depends on where you are staying and travelling. Check the plan details for the networks included before you buy.

Data allowance is the second point. Think about how long you are staying and what you will do online. Maps, messaging, booking apps and photo uploads all use data, and hotspot use for a laptop or a travel companion adds to it. The plan sizes range from 1GB to 50GB, so there is room to match the allowance to the trip rather than guessing.

Validity is the third point. A plan that expires before you leave leaves you without data, so choose a duration that covers your full stay. Durations available are 7, 10, 15 and 30 days.

Hotspot support matters if you plan to share your connection with a laptop or another device. Confirm the plan supports hotspot before you rely on it for work.

Finally, install the eSIM before you fly. Installation needs a stable internet connection, and doing it at home removes the risk of arriving in Bangkok with no data and no easy way to activate. The installation guide at /guides/install-esim-iphone-android walks through the steps for iPhone and Android.

Plans and prices for Thailand

Plans run from 1GB to 50GB with durations of 7, 10, 15 or 30 days, and prices start at $2.29. The table below shows the plan sizes with live prices.

Prices shown are live and can change. Choose the data size first, then the duration that covers your stay. If you are unsure whether your phone supports eSIM, the compatibility guide at /guides/is-my-phone-esim-compatible lists the checks to run before you buy.

Networks and coverage in Thailand

Your eSIM connects automatically to the available networks in Thailand, which include TrueMove H, DTAC, CAT, AIS and True Move, with 5G where those networks provide it. You do not need to configure anything on arrival beyond enabling the eSIM and turning on data roaming for that line.

In practice, coverage varies by location. Bangkok and Chiang Mai are dense urban areas where you will usually find a signal. Phuket and the islands are popular with travellers, and coverage depends on the specific beach, resort or boat trip. If you plan to work from a remote island or travel to smaller islands, download offline maps and any bookings in advance so you are not dependent on a signal at every moment.

Network selection is automatic. Your phone chooses from the networks available to the eSIM, so there is no manual switching to worry about. If you notice a weak signal, moving to a different spot or toggling airplane mode on and off can help your phone reconnect. Never invent expectations about speeds: what you experience depends on the network, the location and how many people are using it at the time.

How much data you need

Match the data size to the length and style of your trip, and remember that hotspot use for a laptop adds to your usage. The plan sizes available are 1GB, 2GB, 3GB, 5GB, 10GB, 20GB and 50GB, with durations of 7, 10, 15 and 30 days.

• One week: 1GB over 7 days for light messaging, maps and the occasional photo.
• Two weeks: 2GB over 15 days if you mostly use messaging and maps and rely on hotel wifi for heavy tasks.
• One month: 3GB over 30 days for a longer stay with similar light usage.
• Island hopping or lots of photo uploads: step up to 5GB or 10GB so you are not counting megabytes on a boat.
• Working remotely or using hotspot for a laptop: choose 20GB or 50GB and keep an eye on usage.

These are starting points, not rules. Video calls, cloud backups and hotspot use consume more data than messaging and maps. If you are unsure, choose a larger size rather than risk running out mid trip.

Install it before you fly

Install the eSIM at home on a stable connection, then enable it when you land in Thailand. Installation is the step most likely to go wrong at the airport, so do it while you still have reliable wifi and time to troubleshoot.

The process is straightforward on both iPhone and Android, and the step by step guide at /guides/install-esim-iphone-android covers the common paths. Before you install, check that your phone is eSIM compatible using /guides/is-my-phone-esim-compatible. Once installed, keep the eSIM disabled until you need it, or enable it on arrival and set it as the line for mobile data. Leave your home SIM in the phone for calls and bank codes, and make sure mobile data is routed to the eSIM so you are not charged roaming by your home operator.

Calls, texts and your home number

This is a data only eSIM: there is no local Thai number, and you cannot make calls or send SMS with it. That is by design, and it is why the plans are simple and priced for travellers.

You can still stay in touch. WhatsApp, FaceTime and similar apps make calls and send messages over data, so as long as you have a data connection you can reach people at home. Keep your home SIM active for calls and bank codes, and set the eSIM as the line for mobile data. When someone calls your home number, your home SIM handles it, subject to your home operator's roaming terms. Check those terms before you travel so you know what calls and texts will cost.

Questions travellers ask about Thailand

The most common questions are about data only use, WhatsApp, hotspot, when the plan starts, topping up and phone compatibility. Short answers follow, and the full details are on the plan page.

Is the Thailand eSIM data only? Yes. There is no local number and no calls or SMS. Data is used for apps, maps and messaging.

Can I use WhatsApp and FaceTime? Yes, calls and messages in those apps work over data. Your home SIM stays in the phone for calls and bank codes.

Does it support hotspot? Check the plan details before you buy, especially if you plan to share data with a laptop or another device.

When does the plan start? The validity begins when the plan is activated, so install before you fly and activate when you land.

Can I top up? Check the plan page for the options available before you travel, and choose a size that covers your stay.

Which phones work? Most recent iPhone and Android phones support eSIM, but confirm with the compatibility guide before buying.