Can I use the eSIM the moment I reach the airport in Bangkok?

Yes. If you install your Yeohaengyusim eSIM before departure, it links up automatically with the AIS network right after landing at Suvarnabhumi (BKK) or Don Mueang (DMK) airport. You can use the Grab app and Google Maps right away, with no need to look for airport Wi-Fi or queue at a SIM kiosk.

Does data work well on islands like Phuket and Koh Samui?

In the resort-dense areas of the main tourist islands such as Phuket, Koh Samui, Koh Chang and the Phi Phi Islands, 4G LTE is stable. Coverage can be weaker, though, on remote island beaches or near small uninhabited islands. During snorkelling or diving tours, it helps to have offline maps downloaded in advance.

Do I need a lot of data to use Grab in Thailand?

Grab needs a live internet connection to assign a driver and show the route. Grab is the most convenient option not only for getting around Bangkok but also for airport pickups, so a stable data connection matters from the moment you enter Thailand. A Yeohaengyusim eSIM connects as soon as you step off the plane, so calling a Grab is no problem at all.

Can I still receive calls to my Korean number in Thailand?

An eSIM does not replace your existing SIM. You leave your Korean SIM in your phone and activate the eSIM as an additional, data-only line. That way you can still receive calls and texts (especially verification texts) to your Korean number while in Thailand. Just remember to block data roaming on your Korean SIM separately — that is the trick to avoiding a shock bill.

I hear Thai power outlets are different from Korea's. How do I charge my devices?

Thailand uses a mix of Type A, B, C and O outlets. Some are compatible with Korean plugs (Type C or Type SE), but depending on your hotel or accommodation you may need an adapter. Packing a multi-adapter before departure gives you peace of mind. You can also buy adapters at convenience stores in busy areas.

Does eSIM work in Thailand?

Thailand supports eSIM, and plans start from ₩2,547. Install it with the QR code you receive after buying, then just turn on data roaming after you arrive and you are connected straight away. There is no need to swap your SIM.

Travel eSIM or carrier roaming: which is cheaper for a trip to Thailand?

For a short trip or light data use, a travel eSIM is usually cheaper. Unlimited roaming from Korean carriers costs about ₩11,000–₩15,000 a day, but with an eSIM you can buy just the days of data you need in advance. For a short trip for one or two people, an eSIM has a big advantage; for a family or very heavy data use, compare carrier unlimited roaming too.

Which carrier network does a Thailand eSIM use?

In Thailand it connects automatically to local carrier networks such as AIS · TrueMove H · True Corporation (incl. DTAC) · National Telecom (NT) (4G/LTE, 5G where supported). Population coverage is about 90%. It picks the network with the strongest signal automatically, so there is nothing to set up.

Can I add to or extend my Thailand eSIM plan?

Yes. When you use up your data or the plan period ends, you can buy a new plan at any time. Keep using the eSIM profile you already installed; there is no need to install it again, so you carry on without interruption.

Can I use tethering (hotspot) in Thailand?

Yes. In Thailand you can share your eSIM data with other devices such as a laptop or tablet by tethering (hotspot). Shared data also comes out of your plan allowance, so if you tether a lot we recommend choosing a little more data.

Do I set up the eSIM before I leave or after I arrive?

We recommend installing it (registering the QR code) before you leave, while you have Wi-Fi. Data starts when you turn on data roaming after you arrive in Thailand. Just remember "set up before you leave, switch on when you arrive" and you can use the internet as soon as you land.

How many GB of data do I need for a trip to Thailand?

For mostly maps and messaging, we recommend about 1 GB a day; to use plenty of social media and photo uploads, about 2 GB a day. If you stream a lot of video or tether a lot, an unlimited plan is better. You can always buy more if you run short, so it is fine to choose a little extra at first.

Thailand eSIM plans

Instant delivery

A travel eSIM for Thailand starts from ₩2,547 and works as soon as you buy it. In Thailand it connects automatically to local networks such as AIS · TrueMove H · True Corporation (incl. DTAC) · National Telecom (NT) (4G/LTE, 5G where supported), with population coverage of about 90%. Install it with the QR code before you leave and you can use the internet as soon as you land, with no roaming setup.

Sent instantly by email
30-day refund
Customer support in Korean
Credit card · Apple Pay

Thailand eSIM at a glance

Price: From ₩2,547
Local networks: AIS · TrueMove H · True Corporation (incl. DTAC) · National Telecom (NT)
Network: 4G/LTE & 5G
Activation: QR code — install before you leave
Recommended data: Maps and messaging 1 GB a day · more room 2 GB a day · video: unlimited

eSIM plans you can use in Thailand

Data	Validity	Price
Unlimited	1 day	₩2,547
Unlimited	3 days	₩11,286
Unlimited	5 days	₩18,067
Unlimited	7 days	₩24,094
Unlimited	10 days	₩33,135
Unlimited	15 days	₩48,203
Unlimited	30 days	₩61,764
1 GB	7 days	₩3,752
2 GB	15 days	₩6,012
3 GB	30 days	₩7,519
5 GB	30 days	₩10,533
10 GB	30 days	₩16,560
20 GB	30 days	₩27,107
50 GB	30 days	₩36,148

Thailand is one of the Southeast Asian destinations Koreans love most. From Bangkok's dazzling royal palace and night markets, to Chiang Mai's tranquil temples and trekking routes, to the emerald seas of Phuket and Koh Samui — few countries let you enjoy so many different attractions in one place. But if you end up wandering the airport kiosks looking for a local SIM, or get caught out by expensive carrier roaming charges, half the fun of the trip is gone. Install your Yeohaengyusim eSIM before departure, and right after landing at Suvarnabhumi International Airport you can open Google Maps, call a Grab and head straight into the city. No need to open your SIM tray, no need to hunt for a local convenience store. To record and share every moment in Thailand, and never get lost — Yeohaengyusim is with you.

Flight time from Korea

About 5–6 hours (direct flight)

Time difference

2 hours behind Korea (UTC+7, KST-2)

Best season to go

November–February (dry season, cooler weather)

Plug type

Mix of A/B/C/O (adapter needed)

Why you need a travel eSIM for Thailand

Thailand is one of the countries where travellers use their smartphones the most. Checking Bangkok's metro (MRT and BTS) lines in real time, getting around safely by Grab instead of tuk-tuk, finding back-alley restaurants on Google Maps — every one of these moments needs a stable data connection. You can buy a SIM locally in Thailand, but the airport kiosks have long queues and prices vary wildly, so choosing is not easy. A Yeohaengyusim eSIM can be bought and installed before departure Korea, so it is ready to use the moment you arrive. Through the AIS network it covers about 90% of Thailand, from central Bangkok to the mountains of Chiang Mai and the island resorts. It supports 4G/LTE and, in major cities, 5G as well, so you can stream YouTube or upload Instagram Reels without buffering. You keep your existing SIM in place and just activate the eSIM on top, so you won't miss calls to your Korean number after you return home either. One Yeohaengyusim eSIM is all you need to capture the heat and beauty of Thailand to your heart's content.

Network coverage in Thailand

Carrier

AIS

+ TrueMove H

Network

4G/LTE & 5G

Coverage

90%

How do I install a Thailand eSIM?

1
Buy a plan
Choose a data plan for Thailand and complete payment.
2
Scan the QR code
Open the email we sent and point your phone camera at its QR code.
3
Install the eSIM
Complete the eSIM installation as prompted. Doing it before you leave is simplest.
4
Connect on arrival
Once you land in Thailand, switch data roaming on and you're online.

1
Buy a plan
Choose a data plan for Thailand and complete payment.
2
Scan the QR code
Open the email we sent and point your phone camera at its QR code.
3
Install the eSIM
Complete the eSIM installation as prompted. Doing it before you leave is simplest.
4
Connect on arrival
Once you land in Thailand, switch data roaming on and you're online.

Which plan is right for me?

Short trip

For a short 3–7 day trip, an unlimited data plan is ideal.

Business trip

We recommend a high-data plan with plenty for video calls and email.

Long stay

Staying a month or more? A large-data plan gives the best value.

Family trip

Families sharing a connection across multiple devices should pick a tethering-enabled plan with a generous data allowance.

eSIM, local SIM or pocket Wi-Fi: what suits a trip to Thailand best?

	eSIM	Local SIM	Pocket Wi-Fi
Activation	Instant (QR code)	Buy locally	Pick up / delivery
Setup	2 minutes	SIM swap needed	Separate device
Price	From ₩2,547	₩10,000~50,000	₩5,000~15,000/day
Network	Local 4G/LTE	Local 4G/LTE	Local 4G/LTE
Devices	1 smartphone	1 smartphone	Up to 5
Flexibility	Top up any time	Fixed data	Daily rental
Best for	Ideal for travellers	Long stays	Families / groups

How about these destinations?

Brunei

Cambodia

Indonesia

Laos

Malaysia

Philippines

Singapore

Vietnam

China

France

Italy

Japan

See all Asia eSIMs Vietnam eSIM eSIM installation help See all destinations eSIM vs carrier roaming — which is cheaper?How many GB of eSIM data do I need?Best travel eSIM — how to choose

Thailand eSIM FAQ

See all destinations

Browse destinations