eSIM Thailand — Stay Connected from Bangkok to Phuket

This eSIM Thailand guide is for travellers who want mobile data working as soon as they land in Bangkok, Phuket or Chiang Mai, without looking for a SIM counter in the arrivals hall. It explains what a Thailand eSIM is, what LimitSim's plans cost (prices checked on 6 October 2026), which Thai networks they use, how coverage holds up from the capital to the islands, and how to set one up before you fly.

One point up front: the plans are data-only. Your own SIM stays in the phone for calls and texts, and WhatsApp, FaceTime and other app calls run over the eSIM's data.

Get your Thailand eSIM16 plans · AIS, dtac, TrueMove H · from €0.53→

What is a Thailand eSIM?

A Thailand eSIM is a digital SIM profile with a Thai data plan that you download to your phone instead of inserting a plastic card. You buy it online, install it by scanning a QR code, and your phone then runs two lines side by side: your home SIM for calls and texts, and the eSIM for mobile data in Thailand.

The eSIM itself (also written e-SIM or e sim) is a chip built into many recent phones. You may see a Thailand eSIM advertised as an "eSIM card", but there is no physical card to post, collect or swap. You can buy an eSIM for Thailand a week before you leave or the evening before, and set it up at home.

A few things to check before you buy:

• Phone support. Your phone needs eSIM support and must not be locked to a carrier. The install section below shows how to check.
• Data only. LimitSim's Thailand plans come without a Thai phone number, calls or SMS. Messaging and calling apps work as usual over data.
• Your home line. Your home SIM can stay active for calls and texts, such as bank codes. Switch off data roaming on it so only the eSIM uses data; your home operator may still charge roaming for calls and texts.

New to the technology? Our explainer on what an eSIM is covers the basics.

eSIM Thailand plans and prices

LimitSim has 16 Thailand plans, from 100 MB for 7 days at €0.54 to 50 GB for 180 days at €57.22, including three unlimited plans with a fair-usage policy. Prices are shown in euros.

Prices on limitsim.com on 6 October 2026; current prices are on the Thailand plans page.

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LimitSim's Thailand plans connect to AIS, dtac or TrueMove H, depending on the plan; the networks for each plan are listed on the plans page. Where the table shows two network pairs, the eSIM you receive uses one of them.

Which plan fits your trip?

If you need a tourist eSIM for Thailand, start from how you use your phone at home, then match the plan to the length of your trip:

• A few days, light use (maps, messaging, ride-hailing): 1 GB for 7 days or 3 GB for 15 days.
• One to three weeks of everyday use: 5 GB or 10 GB, both valid for 30 days, are a sensible starting point, and you can top up if you run low.
• Heavy use or working online: 20 GB or 30 GB for 30 days. For a short, data-hungry trip there is also 50 GB for 10 days on TrueMove H's 4G network (no top-up).
• Long stays: 50 GB for 180 days.
• One busy day: the 1-day plan gives you 2 GB, after which speed drops to 512 kbps.

Unlimited plans come with a fair-usage policy: speed is reduced in steps as you use data, and the thresholds are listed on each plan (summarised in the FAQ below). If you expect to use a lot of data, compare them with the large fixed-data plans.

You pay by card, Apple Pay or Google Pay; if your card is in another currency, your bank converts the amount at its own exchange rate. As a rough guide, the 10 GB / 30-day plan at €8.40 comes to about £7.12, A$13.52 or US$9.41 at the ECB reference rates of 5 October 2026.

For a closer look at month-long and unlimited options, read our guide to a Thailand eSIM for 30 days.

See all Thailand plans16 plans · AIS, dtac, TrueMove H · from €0.53→

Price comparison

On the three Thailand plans that match exactly in data, validity and currency, LimitSim's price was lower than Airalo's on 6 October 2026: by €2.67 (36%) for 5 GB, €2.10 (20%) for 10 GB and €1.84 (11%) for 20 GB, all valid for 30 days.

LimitSim prices: limitsim.com, 6 October 2026. Airalo prices: airalo.com/thailand-esim, checked 6 October 2026, listed in euros by Airalo. Prices change — check both sites before you buy.

Unlimited plans are left out because their fair-usage rules differ, and our guide to the best eSIM for Thailand shows how to choose a plan for each type of trip.

Check today's Thailand prices16 plans · AIS, dtac, TrueMove H · from €0.53→

eSIM vs local SIM card in Thailand

Both get you online; the difference is where and when you buy. A travel eSIM is bought online and installed before you fly, so there is no SIM counter to visit when you land; a local tourist SIM is bought in Thailand at an operator counter or shop.

Tourist SIMs are sold at operator counters in the arrival halls of Bangkok-Suvarnabhumi (BKK), Bangkok-Don Mueang (DMK) and Phuket (HKT) airports, in operator shops and in convenience stores such as 7-Eleven. The main products are AIS's Tourist SIM and Tourist eSIM, True's Thailand Tourist SIM and dtac's Happy Tourist SIM, each sold for a fixed number of days; prices vary. Bring your original passport, because a local SIM is registered to it when you buy.

Since Thai operators sell tourist eSIMs too, the real choice isn't plastic versus digital. It is buying online before the trip versus buying at a counter or shop once you are in Thailand.

• An eSIM bought before you fly suits you if you want data from the moment you land, for maps, messages and ride-hailing, and would rather skip the SIM counter after a long flight.
• A Thai SIM or Thai eSIM bought locally suits you if you need a Thai phone number (check what the package includes), or if your phone has no eSIM support and needs a physical card.

We compare both in more detail, airport counters included, in eSIM vs local SIM card in Thailand.

Coverage in Bangkok, Phuket and the islands

Bangkok, Phuket, Krabi, Koh Samui and Chiang Mai are well covered with 4G, and 5G is available in many central and tourist areas. Expect weaker or no signal in remote mountain areas and national parks, on small, remote islands and out at sea.

A Thailand eSIM has no network of its own; it uses the Thai operators' networks. The two big operators are AIS and True Corporation, and True runs two brands, TrueMove H and dtac, which have shared one combined network since 2025. Both say they reach the vast majority of the population: AIS reports 5G population coverage above 95%, and True reports 94% for 5G and 99% for 4G (operators' own 2025 figures). These are network-wide figures, not a promise of 5G on every plan: the 50 GB / 10-day plan, for example, uses TrueMove H's 4G network.

Population coverage is not the same as signal everywhere. The operators have been extending coverage along ferry routes (AIS announced sea coverage on both coasts in November 2024, and True announced 5G on the ferry route to Koh Phangan in August 2026), but these are operator announcements rather than independent tests. Download offline maps before a trek or a boat trip.

For more detail by destination:

• eSIM for Bangkok and Phuket: getting online on arrival, coverage in the city and on the island, and which plan fits your route.
• Phuket, the islands and the ferries: what to expect on Krabi, Phi Phi, Koh Samui and the boats in between.
• Chiang Mai eSIM guide: mobile data in the north.

Combining Thailand with Singapore, Malaysia or Vietnam

If Thailand is one stop on a longer route, a regional eSIM covers several countries on one plan. LimitSim sells a Singapore, Malaysia and Thailand plan and a five-country plan that also covers Vietnam and Indonesia.

The three-country plan suits an overland trip from Singapore through Malaysia to southern Thailand. The five-country plan fits a longer loop, for example Bangkok and the islands followed by Vietnam or Bali.

If you live in Singapore or Malaysia and Thailand is your only destination, a Thailand plan from the table above is enough. Prices and validity options for the regional plans are on each plan's page.

How to install a Thailand eSIM

Install the eSIM at home over Wi-Fi before you fly, then switch your mobile data to it after landing. When the validity period starts is shown in each plan's details.

1. Check your phone. It must support eSIM and must not be locked to a carrier. The iPhone XS, XS Max, XR and later models support eSIM, as do the Google Pixel 4 and later; Samsung Galaxy S models from the S20 onwards do too, depending on the country version. A quick check for any phone: dial *#06#, and if an EID number appears, the phone has an eSIM. Our list of eSIM-compatible phones has more models.
2. Buy your plan. After payment, the eSIM arrives by email and in your LimitSim account and app, as a QR code plus codes for manual entry.
3. Install it on Wi-Fi. Scan the QR code, or type in the codes, on the phone you will travel with. Step-by-step guides: iPhone and Android.
4. Leave it on the phone. Install the eSIM once and don't delete it, because some eSIMs cannot be installed a second time.
5. Switch over after landing. Select the eSIM as your mobile data line, turn on data roaming for the eSIM, and keep data roaming off on your home SIM.

The full walkthrough for iPhone and Android, plus what to do if the eSIM doesn't connect, is in how to set up a Thailand eSIM.

FAQ

Does an eSIM work in Thailand?

Yes. LimitSim's Thailand plans connect to AIS, dtac or TrueMove H, depending on the plan; the networks for each plan are listed on the plans page. Your phone needs eSIM support and must not be locked to a carrier.

Does a Thailand eSIM come with a phone number?

Not with LimitSim: its Thailand plans are data-only, so there is no Thai number and no regular calls or SMS. Your own SIM and number keep working, and WhatsApp, FaceTime and other app calls work over the eSIM's data. If you need a Thai number, look at a local tourist SIM and check what its package includes.

Can I install the eSIM before I leave home?

Yes. Install it over Wi-Fi at home, then switch your mobile data to the eSIM after you land; when the validity period starts is shown in the plan details. Once it is installed, keep it on the phone, as some eSIMs cannot be installed a second time.

Can I top up if I run out of data?

Yes, on most plans. You can top up in the LimitSim app or on the website when you are signed in. The 50 GB / 10-day plan is the exception and cannot be topped up.

Do the unlimited Thailand plans have any limits?

Yes. LimitSim's unlimited Thailand plans come with a fair-usage policy that reduces speed in steps as you use data: the first 500 MB run at full speed, then up to 5 Mbps. Speed is limited to 512 kbps after 25 GB on the 7-day plan, 40 GB on the 15-day plan and 65 GB on the 30-day plan, and total use over the validity period is capped at 30 GB, 45 GB and 70 GB respectively.

Can one eSIM cover Thailand and Vietnam or Singapore?

Yes, with a regional plan. LimitSim's five-country plan covers Singapore, Malaysia, Vietnam, Thailand and Indonesia, and its three-country plan covers Singapore, Malaysia and Thailand. Prices and validity options are on each plan's page.

Before you fly: a short checklist

Before you leave, install the eSIM, fill in Thailand's digital arrival card, check how long you can stay without a visa and save offline maps.

• Install your Thailand eSIM at home over Wi-Fi and leave it on the phone.
• Fill in the TDAC. Since May 2025, every foreign visitor has to complete the Thailand Digital Arrival Card online before arriving; it replaced the old paper arrival card and was still required in October 2026. Use the official site, tdac.immigration.go.th, during the three days before you land. It is free, so a website that asks for a fee is not the official form.
• Check your visa-free days. Since 15 September 2026, tourists from 60 countries and territories, including India and most European countries, can stay in Thailand without a visa for up to 30 days; the limit used to be 60 days. Rules depend on your passport and can change, so check the official Royal Thai Embassy website before you travel.
• Save offline maps for treks, national parks and boat trips.

With that done, all that's left after landing is switching your mobile data to the eSIM.

Choose your Thailand plan16 plans · AIS, dtac, TrueMove H · from €0.53→