Best SIM Card in Thailand 2026 Guide
Thailand has excellent, affordable mobile data. For most tourists the choice comes down to three options: an AIS tourist SIM, a True Move H tourist SIM, or a pre-installed eSIM sorted before you fly. Physical SIM cards cost ฿299–฿1,199 (~£7–£28) depending on plan and where you buy. An eSIM from KKday can be installed at home, arrives cheaper than airport kiosks, and means your phone is live the moment you land.
Get Your Thailand SIM Card or eSIM
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AIS, True Move H or eSIM? Quick Comparison
| Option | Best for | Cost | Where to buy |
|---|---|---|---|
| AIS Tourist SIM | Islands, remote areas | ฿299–฿599 | Airport, 7-Eleven |
| True Move H / dtac | Bangkok, cities, social media | ฿299–฿499 | Airport, 7-Eleven |
| eSIM (pre-trip) | eSIM-compatible phones, convenience | ~$8–$14 | KKday online |
| Airport SIM | Need data immediately on landing | ฿1,199 (~£28) | Airport counters |
Prices verified August 2026. Airport prices are 30–50% higher than in-city stores for the same plan.
AIS — Best Coverage on Islands and Remote Areas
AIS is Thailand’s largest mobile operator and consistently rated best for nationwide coverage — particularly on islands, northern mountain provinces and areas away from the main cities. If your trip includes Koh Lipe, Koh Tao, Koh Chang, remote parts of Chiang Rai or anywhere off the main tourist circuit, AIS is the most reliable choice.
Tourist SIM plans (August 2026):
- 8 days unlimited data: ฿299 (~£7)
- 15 days unlimited data: ฿399 (~£9)
- 30 days unlimited data at 7-Eleven: ฿599 (~£14)
- 30 days unlimited at airport: ฿1,199 (~£28)
Available at all major Thai airports, 7-Eleven stores, Family Mart and official AIS shops. Passport required at point of sale.
True Move H (formerly dtac) — Best for Cities and Social Media
True Move H is now Thailand’s second largest network following the 2023 merger between True Corporation and dtac. Both brands continue operating under their own names but run on the same combined network. In practice a True Move H SIM and a dtac SIM give you access to the same towers.
True Move H performs excellently in Bangkok, Chiang Mai, Pattaya and Phuket. Many tourist packages include unlimited social media (Facebook, Instagram, Line) that doesn’t count against your main data allowance.
- 7 days: ฿299 (~£7)
- 15 days: ฿499 (~£12)
- 30 days from: ฿599 (~£14) in-store
Which Network Should You Choose?
- Island hopping or remote trekking: AIS
- Bangkok and city-focused trip: True Move H or dtac (same network since 2023)
- Heavy social media use: True Move H for unlimited social add-ons
- Want to avoid the airport queue entirely: eSIM via KKday
Physical SIM vs eSIM
If your phone supports eSIM (most phones made after 2019), an eSIM bought before you travel is the most convenient option. Install at home, set to activate on arrival, and walk out of baggage claim already online. No queue, no fumbling with a SIM tray.
| Physical SIM | eSIM | |
|---|---|---|
| Install | At airport or in-store | At home before flying |
| Activation | Immediate | On landing |
| Dual SIM | Remove home SIM | Keep home SIM active |
| Price | ฿299–฿1,199 | ~$8–$14 |
Key advantage of eSIM: keep your home SIM active for calls and bank OTP codes while using the Thai eSIM for data. Very useful for UK visitors whose bank sends SMS verification codes.
Buy a Thailand eSIM Before You Fly
Skip the airport queue — install in minutes, active on landing
Get a Thailand eSIM →Thailand SIM cards & eSIMs · KKday
Where to Buy a Thailand SIM Card
- Before you fly (eSIM): KKday lets you compare Thailand SIM and eSIM plans, choose your coverage period and have everything ready to activate on landing. No queues, no language barrier.
- Airport: All major airports have AIS, True Move H and dtac counters in arrivals. Convenient but 30–50% more expensive than in-city. ฿1,199 for 30 days vs ฿599 at 7-Eleven.
- 7-Eleven: Best value for physical SIMs. ฿299–฿599. Over 13,000 stores across Thailand. You need your passport.
- Official carrier stores: In all major malls and city centres. Best for plan advice and local (non-tourist) SIMs for stays over 30 days.
Do You Need Your Passport?
Yes. Thai law requires passport registration for all SIM purchases at airports, 7-Eleven and carrier stores. For eSIMs bought online in advance, registration is completed digitally during checkout.
How Much Mobile Data Do You Need?
- Short holiday (7–14 days): 7–15 day unlimited plan, ฿299–฿399. More than enough for any tourist use.
- Three weeks or more: 30-day unlimited at ฿599 in-store, or a pre-trip eSIM plan from KKday.
- Digital nomads / DTV visa holders: Local prepaid SIM from a carrier store. Plans start from ฿49 and ongoing costs are 50–70% cheaper than tourist packages.
For long-stay visitors: see our Thailand DTV Visa guide and guide to opening a Thai bank account.
Mobile Coverage in Thailand
All three networks offer 5G in major cities and tourist areas. Bangkok, Chiang Mai, Phuket, Pattaya, Koh Samui and most tourist routes are well served. Coverage thins in rural areas and smaller islands where AIS tends to maintain better signal.
Tips Before You Buy
- Check eSIM compatibility first — Settings → About → look for “Add eSIM.” Most phones from 2019 onwards support it.
- Don’t buy at the airport unless you must. You’ll pay up to double. A 7-Eleven is usually within 10 minutes of any airport exit.
- Use Grab from day one. Having data before your first Grab ride removes a lot of arrival stress.
- Take a screenshot of APN settings if buying a physical SIM — sometimes they don’t configure data automatically on unlocked phones.
- Local SIMs for stays over 30 days — tourist pricing doesn’t scale well. Local prepaid plans are 50–70% cheaper for longer stays.
Frequently Asked Questions
What is the best SIM card in Thailand?
For islands and remote areas: AIS. For city travel: True Move H or dtac (same network since 2023). For convenience with an eSIM-compatible phone: buy an eSIM before you fly via KKday.
How much does a SIM card cost in Thailand?
Physical tourist SIMs: ฿299–฿599 at 7-Eleven (~£7–£14), ฿1,199 at airports (~£28). eSIMs bought online: ~$8–$14.
Is dtac still available?
Yes. dtac merged with True Corporation in 2023 and now runs on the True Move H network. dtac-branded SIMs still appear at airports and stores and perform identically to True Move H.
Can I use an eSIM in Thailand?
Yes — if your phone supports eSIM (most 2019+ phones). You install before flying, it activates on landing, and you keep your home SIM active for calls and bank SMS. Buy via KKday.
Do I need a passport?
Yes for physical SIM purchases. For eSIMs bought online, registration is done digitally at checkout.
Sort Your Thailand SIM Card Now
Compare eSIM and physical SIM options — delivered digitally or to your door
Browse Thailand SIM & eSIM Options →Thailand SIM cards & eSIMs · KKday
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