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How to choose a Thailand SIM or eSIM and compare prices

If you’re staying in Thailand for a short time and use a lot of data, consider the dtac HAPPY TOURIST SIM, which includes 15GB for 8 days at 299 baht. For unlimited data, compare plans from AIS or True·dtac. If keeping your usual phone number is important, compare roaming plans from your home carrier. Check whether your phone supports eSIM and is unlocked, then choose a plan that fits your trip.

At a glance

How much do Thailand SIM and eSIM plans cost?

Comparing prices alongside data allowances makes it easier to choose. Unlimited plans from AIS and True·dtac may have different speed conditions depending on the plan.

PlanDuration · DataPrice
AIS LUCKY TOURIST SIM1 day · 1GB, up to 10Mbps49 baht
AIS LUCKY TOURIST SIM5 days · Unlimited 5G·4G399 baht
AIS LUCKY TOURIST SIM8 days · Unlimited 5G·4G499 baht
AIS LUCKY TOURIST SIM15 days · Unlimited 5G·4G699 baht
AIS LUCKY TOURIST SIM30 days · Unlimited 5G·4G1,199 baht
AIS LUCKY TOURIST SIM60 days · Unlimited 5G·4G1,599 baht
dtac HAPPY TOURIST SIM8 days · 15GB299 baht
dtac HAPPY TOURIST SIM10 days · 50GB349 baht
dtac HAPPY TOURIST SIM15 days · 30GB599 baht
True·dtac TOURIST INFINITE SIM8 days · Unlimited internet at the plan’s maximum available speed499 baht
True·dtac TOURIST INFINITE SIM15 days · Unlimited internet at the plan’s maximum available speed699 baht
True·dtac TOURIST INFINITE SIM30 days · Unlimited internet at the plan’s maximum available speed1,199 baht

How do you choose based on trip length and data use?

Start by narrowing down plans that cover your trip, then consider your usual data use for maps, messaging, and video. For both fixed-data and unlimited plans, check the data allowance and speed conditions.

  1. Short trip

    For a trip of 8 days or less, compare the prices and data terms of the 8-day plans. If 15GB seems sufficient, consider dtac’s plan; for unlimited data, look at AIS or True·dtac.

  2. Heavy data use

    If you stream and upload often, check the speed conditions for unlimited plans. If a fixed allowance is enough, you can also compare dtac HAPPY TOURIST SIM’s 10-day, 50GB plan.

  3. Keeping your usual phone number

    If you need to receive calls or texts on your usual number, consider roaming with your home carrier. Some SK Telecom baro plans list the speeds available after you use up your data.

  4. Using an eSIM

    Check whether your phone supports eSIM, then compare tourist eSIM plans from AIS or True·dtac. If you choose a physical SIM, you’ll need to replace your current SIM.

Where and how can you buy a tourist SIM in Thailand?

AIS offers eSIM purchase options for some durations on its official Tourist SIM plans. True·dtac also offers Tourist eSIM and physical SIM options, available through its online store, service centers, and airport outlets.

  1. Buy online

    Choose your preferred duration and eSIM or physical SIM option on the official tourist SIM pages for AIS or True·dtac. True·dtac lists the True/dtac Online Store as an online retailer.

  2. Buy at the airport

    Tourist SIMs are available at airport outlets, and True·dtac says its airport outlets are open 24 hours. AIS lists sales points in the baggage claim area at Suvarnabhumi Airport, as well as at Don Mueang, Chiang Mai, and Phuket airports.

  3. Register your SIM

    To register a True·dtac SIM online, connect to Wi-Fi, scan the QR code, enter your SIM barcode or number and passport details, then complete facial verification. A valid passport is required to register a tourist SIM.

Should you choose an eSIM or a physical SIM?

You can buy and install an eSIM online on a compatible phone, without swapping a physical card. Physical SIMs are available at airport outlets and service centers. Choose the option that will be easiest for you to use during your trip.

Choose the right option for your situation

  1. When 15GB is enough for an 8-day trip

    Check the data allowance and terms for dtac HAPPY TOURIST SIM’s 8-day plan, which costs 299 baht.

  2. When you don’t want to worry about data use

    Choose an unlimited tourist plan from AIS or True·dtac, and check the maximum available speed for that plan.

  3. When you need to receive calls or texts on your usual number

    Before you leave, check roaming plans and rates for Thailand from your home carrier.

  4. When you want to buy a SIM at the airport as soon as you arrive

    Buy a tourist SIM at an airport outlet and complete the passport registration process.

Before you leave: checklist

FAQ

Should you choose an eSIM or physical SIM for a trip to Thailand?

To use an eSIM, first check whether your phone supports it. Physical SIMs are available at airport outlets and service centers and require passport registration.

How much does a SIM for 8 days in Thailand cost?

The dtac HAPPY TOURIST SIM includes 15GB for 8 days at 299 baht. The 8-day tourist plans from AIS and True·dtac each cost 499 baht.

Can you buy a tourist SIM at the airport in Thailand?

Yes. True·dtac sells tourist SIMs at airport outlets and says they’re open 24 hours. AIS also lists sales points at major Thai airports.

Do you need a passport to register a tourist SIM in Thailand?

True·dtac tourist SIMs must be registered with a valid passport. Online registration involves entering your SIM details and passport information, then completing facial verification.

Can you use a hotspot with a Thai SIM?

If you need hotspot access, check the current terms for that plan before you buy.

Can you extend the validity of a True·dtac tourist SIM?

The validity period is printed on the SIM package and is up to 60 days. You cannot extend it by topping up after it expires.

Official sources & check dates

More practical info

Site updated: 2026-10-28