eSIM in Thailand
One eSIM for Bangkok, Chiang Mai and the islands. No roaming bill, no airport SIM queue, no commitment.
Covers Bangkok to Phuket to Chiang Mai
Skip the Passport SIM Registration
Free Data, Data per GB, or Unlimited Data
One eSIM for 176 + Countries
Trusted by 1.3M+ users
Global data & calling
One eSIM for the globe
A Free Global Connection
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Why Firsty is different in Thailand
Same price as everywhere else Thailand's cheap. Your data should be too. €0.98 per GB on Prepaid, from €2/day on Unlimited, the same as in Vietnam, Japan or Italy. No Southeast Asia surcharge, no island premium. Buy data that never expires Most travel eSIMs make you buy GBs that expire in 7 or 30 days: use it or lose it. With Firsty Prepaid, the GBs you buy stay on your account forever. Bought 10 GB and only used 4 between Bangkok and Krabi? The other 6 are still there for Bali, Hanoi, or anywhere else.
How it works
How Firsty works in Thailand
How much data do you need in Thailand?
Bangkok city break
Bangkok + the islands
Backpacker / remote worker
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Where's Life Taking You next?
Get connected to the Firsty Network
Price table & Coverage
Prepaid (use anywhere, never expires)
Data | Price | €/GB |
|---|---|---|
1 GB | €4,50 | €4,50 |
3 GB | €7,50 | €2,50 |
5 GB | €9,50 | €1,90 |
10 GB | €17,00 | €1,70 |
20 GB | €26,40 | €1,32 |
50 GB | €49,00 | €0,98 |
Unlimited (day pass or monthly)
Duration | Price | €/day |
|---|---|---|
1-6 days | €3,00/day | €3,00 |
7-14 days | €2,75/day | €2,75 |
15-19 days | €2,50/day | €2,50 |
20+ days | €2,20/day | €2,20 |
Monthly subscription | €59/month | €2,00 |
Where in Thailand does Firsty work?
Bangkok: Fast 4G and 5G in Sukhumvit, Silom and Siam, and along the BTS and MRT lines. Chiang Mai & the north: Reliable in the Old City and Nimman. Short dead zones on the winding road to Pai. Phuket: Strong 4G with 5G in the main towns and beach areas. Koh Samui: Strong on Chaweng and Lamai beaches; weaker in the hilly interior. Krabi, Koh Phi Phi & Koh Lanta: Good around Ao Nang and Lanta's west coast; patchy in remote bays and no signal mid-ferry. Pattaya: 4G and 5G across the city.
What are the eSIM plans available in Thailand?
The best eSIM plans available in Thailand cater to various data needs. Firsty offers both free and paid plans for seamless connectivity. With Firsty Free, you get ad-supported data for basic internet use. For heavy data users needing high-speed internet for streaming and video calls, First Class is perfect, especially in vibrant cities like Bangkok, Chiang Mai, and Phuket.
How can I activate a travel eSIM for Thailand?
Activating a travel eSIM for Thailand is a breeze:
Ensure you have a stable Wi-Fi connection to download the Firsty app.
Open the app and follow the super easy setup process to activate your free eSIM.
When you arrive in Thailand, your connection will be ready instantly.
For faster internet, upgrade to Comfort+ or First Class, which you can purchase and activate anytime without needing WiFi.
Is it worth getting an eSIM for Thailand?
Yes, if you want to skip the airport queue and keep your home SIM in your phone. Thai tourist SIMs are cheap, but you'll need your passport, a face scan and a SIM swap. Firsty installs before you fly and connects the moment you land.
What's the best eSIM for Thailand?
The one that fits your trip. For a few days of maps and messaging, Firsty Free costs nothing. For island-hopping with hotspot, Unlimited from €2/day means no counting. Doing Thailand plus Vietnam or Japan? One Firsty eSIM covers them all at the same price.
Does Firsty work everywhere in Thailand?
In cities, resorts and on the main islands, yes. Firsty uses Thailand's major networks, AIS and True, which cover Bangkok, Chiang Mai, Phuket, Krabi and Koh Samui well. Expect gaps on ferry crossings, in remote bays and on mountain roads up north.
Can I use my Firsty eSIM as a hotspot in Thailand?
Yes. Share your data with your laptop or a travel buddy on Prepaid or Unlimited. On Unlimited you get 5 GB a day at high speed, then 512 Kbps until your next day or top-up, so save big downloads for hotel Wi-Fi.
Can I make calls and send SMS with Firsty in Thailand?
Firsty is a data eSIM: calls and texts work through LINE, WhatsApp, FaceTime, or any internet-based app. International calling to 200+ countries is available through the Firsty app at transparent per-minute rates.