What’s the Best SIM Card for Thailand Travel in 2024?

You land in Bangkok after a long flight, and the first thing you need is data for Grab, maps and a message to your hotel. Then you see three bright kiosks side by side, each with plans that look almost identical. Which one do you choose? This guide helps you decide in a few minutes. The price and data figures below come from the most recent tourist plan tiers we have, and operators rotate promotions often. Treat them as a reliable guide and confirm the live offer at the counter.

Quick Answer: Which Tourist SIM Should You Pick?

The three main operators are AIS, DTAC and TrueMove H. Their tourist plans are very close in price and data, so the “best” SIM is usually the one with the better current deal at the counter.

• Trips up to 15 days: Any of the three works well in cities and popular tourist areas. These are the AIS Traveller SIM, the DTAC Happy Tourist SIM and the True Tourist SIM. Compare the data on offer and choose the best one.
• Trips of 15 to 30+ days: Look at the 30-day tourist plans. You can also buy a standard prepaid SIM and add data packages as you need them, which can sometimes cost less on a long stay.
• Remote islands and rural areas: AIS is often seen as having slightly better coverage there. This is a general perception and depends on the exact location.
• Phone supports eSIM: An eSIM is the easiest option, and it lets you keep your home SIM active at the same time.

Passport Registration: The One Rule You Can’t Skip

Thai law requires every SIM card, physical or eSIM, to be registered to an individual. As a tourist, you must show a valid passport when you buy. The staff scan it and link it to your new number. This rule has been enforced for many years, and nothing about it has changed.

In practice, keep your passport in your hand luggage or day bag, not in a checked suitcase. Without it, no official seller can complete your registration. That is also why airport counters and official stores are the smoothest places to buy. The staff do the registration for you.

AIS vs DTAC vs TrueMove H: Plans Side by Side

The three operators offer almost the same price ladder. Here is what each one offers.

AIS Traveller SIM

AIS offers high-speed data, then unlimited throttled data once you reach the cap. It also includes local call credit, and some promotions give free access to apps such as WhatsApp, Line and Facebook Messenger. You can check offers at www.ais.th/travellersim/ and manage your number in the My AIS app.

DTAC Happy Tourist SIM

DTAC follows a similar formula, with high-speed data, unlimited throttled data and local call credit. It sometimes adds perks such as free calls within the DTAC network. You can find details at www.dtac.co.th/en/prepaid/sim-form.html and manage your plan in the DTAC App.

True Tourist SIM (TrueMove H)

True offers competitive data and call packages, and its plans often include access to the operator’s network of public WiFi hotspots. See www.truemoveh.truecorp.co.th/package/tourist_sim for offers. You top up with the TrueMoney Wallet app and manage your account in True iService.

Typical plan tiers

All three follow the same general structure:

• 8-day plan: Often 15GB or 30GB of high-speed data, then unlimited data at a reduced speed (for example 256kbps or 4Mbps), plus 15–50 THB of call credit. Price: 299 THB for 15GB, up to 449 THB for 30GB.
• 15-day plan: Often 30GB or 50GB of high-speed data, then reduced-speed unlimited data, plus 50–100 THB of call credit. Price: 499–699 THB.
• 30-day plan: Higher data allowances for longer stays. Price: 799–999 THB.

Exact data and call credit change with promotions, so confirm them before you pay.

eSIM or Physical SIM?

AIS, DTAC and TrueMove H all offer eSIMs. Tourist eSIM plans are generally priced like their physical SIM equivalents, so the choice is about convenience, not cost. You can read each operator’s eSIM information at www.ais.th/esim/, www.dtac.co.th/esim and www.truemoveh.truecorp.co.th/esim.

How to set up an eSIM

1. Check your phone. Make sure it supports eSIM. Most newer flagship models do.
2. Buy the plan. Purchase online through the provider’s website or at an official store. Online purchases often give you a QR code by email.
3. Add it in Settings. Go to Settings > Mobile Data (or Cellular) > Add eSIM (or Add Data Plan).
4. Scan the QR code. Follow the on-screen prompts to finish installing the profile.
5. Choose your data line. You may need to select the eSIM as your primary data line.

Pros and cons

• Benefits: There is no physical card to lose. You can switch between profiles easily. You can keep your home SIM active for calls and texts while the eSIM handles data.
• Drawbacks: Not every phone supports eSIM. Setup can feel a little more technical than just inserting a card.

If you can, buy and activate the eSIM before you fly, or at an airport kiosk. Then you have data the moment you land.

Step-by-Step: Buying a SIM at the Airport

The airport is the easiest place to buy. AIS, DTAC and TrueMove H kiosks are in the arrivals halls at Suvarnabhumi (BKK), Don Mueang (DMK) and Phuket International Airport (HKT).

1. Clear immigration and customs. Then head into the arrivals hall.
2. Find the kiosks. Look for the branded AIS, DTAC and True counters. They are usually next to each other.
3. Choose a provider. Go by current promotions, reputation for coverage or past experience.
4. Hand over your passport. The staff scan it for the mandatory registration.
5. Tell them your plans. Say how many days you are staying and how much data you need. They will suggest a suitable tourist package.
6. Pay in THB. Cash and major credit or debit cards are usually accepted.
7. Let them install and activate. Staff usually insert the SIM, activate the plan and run a quick test call or speed check. The whole process takes about 5–10 minutes.
8. Test it yourself. Before you walk away, check that you have signal, that a web page loads and that calls work.
9. Keep your home SIM safe. If staff removed your home SIM, keep it and the ejector tool somewhere secure.

Other Places to Buy, Activate and Top Up

Where else to buy

• Official operator stores: These are found in shopping malls and across major cities. They offer full service and a wider range of plans.



• 7-Eleven and FamilyMart: They sell pre-activated SIMs, but you still need to register with your passport. That often means help from the clerk or self-registration steps, which are hard without Thai. For specific tourist packages, an airport counter or official store is usually better.
• Online pre-order: Some providers let you order a SIM for airport pickup or international delivery, which saves time on arrival.

Activation and balance codes

If you buy at a convenience store, you may need to dial a code or use the provider’s app to activate and pick a plan. The codes are *121# for AIS, *101*9# for DTAC and *9000# for TrueMove H. You can also use them to check your balance or data, along with the My AIS app, the DTAC App or the True iService app.

Topping up

• Apps: My AIS, the DTAC App, or TrueMoney Wallet for TrueMove H.
• Convenience stores: Give the cashier your phone number and the amount.
• Official stores: Staff can top you up.
• Online: Use the provider’s website or third-party services.

Network Coverage: Cities, Islands and Trains

Thailand’s mobile network is strong, but it varies by location.

• Big cities (Bangkok, Chiang Mai, Phuket, Pattaya): All three operators offer excellent 4G and fast-growing 5G. Speeds suit streaming and video calls.
• Major tourist areas (Krabi, Koh Samui, Hua Hin, Koh Lanta): Strong 4G/5G is typically available from every provider.
• Remote islands and rural areas: Coverage becomes patchy. Parts of Koh Kood, Koh Lipe and smaller, less developed islands may have weak or no signal on certain networks. AIS is often seen as having the widest coverage in rural and remote areas, though this is subjective and depends on the spot. If you are heading somewhere very isolated, check recent traveller reviews or local forums.
• State Railway of Thailand trains: Signal can drop in tunnels, mountains and very remote stretches of track.
• Grab: You need a stable data connection to book and track a driver. This is rarely a problem in cities. In remote areas, make sure you have signal before you try to book.

Is Free WiFi Enough?

Free WiFi is easy to find. Hotels, guesthouses and hostels almost always offer it. Most cafes, restaurants and bars have it too, so look for a sign or ask staff for the password. Large shopping malls often run free public networks. Quality, however, varies a lot. A modern cafe can have excellent speeds, while a small or older venue may be slow or drop out.

There are two more issues. Public WiFi is less secure than a private connection, so use a VPN for sensitive tasks such as online banking. And WiFi doesn’t help when you are on the move. If you are using Google Maps or booking a Grab from a street corner, you need mobile data. A local SIM gives you steady, personal internet wherever you are.

2026 Budget Reality: What You’ll Pay

Tourist SIM prices are very similar across the three operators. Use these ranges as a planning guide, then confirm the current offer at the counter.

• Budget: An 8-day plan at 299 THB (typically 15GB). This suits a short city break where you also use hotel and cafe WiFi.
• Mid-range: An 8-day plan at up to 449 THB (typically 30GB), or a 15-day plan at 499–699 THB (30GB or 50GB). This suits most two-week trips with regular maps, Grab and video calls.
• Comfortable: A 30-day plan at 799–999 THB, for longer stays or heavy data use, including working remotely.

Budget a little extra for top-ups if your trip runs longer than your plan.

What Has Changed in Recent Years

• More data for the same price: Plans that once gave 8GB or 10GB now typically give 15GB or 30GB for the same 299–449 THB on an 8-day plan.
• eSIM is mainstream: eSIMs used to be a niche offer. Now all three operators provide them as a standard option.
• 5G has spread: 5G is no longer limited to central Bangkok and major cities. Many tourist destinations and some smaller cities now have solid 5G coverage.
• Stable brands, rotating promotions: No major tourist SIM brand has been discontinued. The bundles, add-ons and free social media apps change often.

Common Mistakes to Avoid

• Packing your passport in checked luggage. You cannot register a SIM without it.
• Buying the first plan you see. The three kiosks are next to each other, so compare before you pay.
• Choosing a plan that is too short. Plans run for 8, 15 or 30 days. Count your whole stay, including your last day.
• Trying to self-register at a convenience store. It can be hard without Thai. For tourist packages, use an airport counter or official store.



• Not testing before you leave the counter. Check signal, a web page and a call while the staff are still with you.
• Losing your home SIM. If the clerk swaps your SIM, keep the original and the ejector tool somewhere safe.
• Assuming signal everywhere. On remote islands and long train journeys, coverage can drop. Download offline maps and book key transport in advance.
• Using public WiFi for banking. Use a VPN, or switch to mobile data.

Frequently Asked Questions

What is the best SIM card for tourists in Thailand?

For trips up to 15 days, the AIS Traveller SIM, DTAC Happy Tourist SIM and True Tourist SIM all work well in cities and tourist areas, with similar pricing. Pick the best current data deal at the airport. For remote islands, AIS is often cited as having slightly better coverage.

Do I need my passport to buy a SIM card in Thailand?

Yes. Thai law requires every SIM, physical or eSIM, to be registered to an individual. Tourists must show a valid passport at purchase, and staff scan it and link it to the SIM. Keep your passport in hand luggage, because you cannot complete registration without it.

Can I use an eSIM in Thailand?

Yes. AIS, DTAC and TrueMove H all offer eSIMs, usually priced like physical tourist SIMs. Your phone must support eSIM. You scan a QR code through your settings, then choose the eSIM for mobile data. It lets you keep your home SIM active for calls and texts.

How much does a tourist SIM cost in Thailand?

An 8-day plan typically costs 299 to 449 THB, a 15-day plan 499 to 699 THB, and a 30-day plan 799 to 999 THB. Higher prices bring more high-speed data. Exact data and call credit change with promotions, so confirm them at the counter.

Is free WiFi enough, or do I need a SIM?

Free WiFi is common in hotels, cafes and malls, but speed varies and public networks are less secure. It does not help for navigation or booking Grab on the move. A local SIM gives steady personal internet. Use a VPN for banking on public WiFi.

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📷 Featured image by Natasha Ruf on Unsplash.