Thailand's smartest travel eSIM. Skip the airport SIM queue. Instant 5G on AIS — Thailand's #1 network.
The best eSIM for Thailand is one that works instantly, avoids roaming fees, and doesn’t require local SIM registration. Ovosim connects you immediately on arrival with reliable 5G coverage.
Thailand eSIM Configuration
Instant delivery
⭐ 4.8/5 · 1,200+ verified travelers.
3GB/Day
5GB/Day
2GB/Day
Why smart travelers switch to Ovosim for Thailand.
| Feature | OVOSIM | Airalo | Your Carrier Roaming |
|---|---|---|---|
| Cost (Standard Plan) | From €3.49 | €8.99 | $10/day+ |
| Network Speed | 5G / 4G+ Priority | Throttled | Varies |
| Setup | Instant QR | Manual | Automatic |
| Works with foreign cards | Yes | Limited | No |
| Available at airport | Before arrival | Sometimes | No |
Last updated:
No surprises at the airport. Activate instantly on arrival.
Chat with actual humans if something goes wrong.
No hidden fees. No roaming charges. Period.
Ready in 3 simple steps.
Go to Settings > Cellular > Add eSIM and scan the QR code from our website
Name it 'Travel Data'. Set it to 'Secondary' so your main number still works.
When you land, turn on 'Data Roaming' for the eSIM line only.
Thailand has three major carriers: AIS, TrueMove, and DTAC (now merged with TrueMove). AIS consistently ranks first in independent speed tests by Opensignal and Ookla. Critically, AIS has the strongest signal in the Southern Islands (Koh Samui, Koh Phangan, Koh Tao) where TrueMove coverage can be patchy near the ferry piers.
Ferry WiFi between the Gulf of Thailand islands is essentially unusable for anything beyond messaging. Your eSIM will lose signal about 10km offshore and reconnect when you approach the destination island. This is normal. For navigation between islands, download offline Google Maps before boarding. Our AIS eSIM reconnects quickly at the pier on arrival.
Never take an unmetered taxi from Suvarnabhumi airport without a data connection — the scams are well-documented. Grab Thailand shows you a fixed price upfront. You need a working internet connection to book it. Ovosim is active before you leave the plane, giving you instant access to Grab as you walk through arrivals.
AIS has the best rural coverage in Northern Thailand. The mountain roads to Pai and the hilltribe villages near Chiang Rai have patchy signal from all carriers, but AIS maintains 3G/4G longer into remote areas than competitors. For the Doi Inthanon National Park drive, expect intermittent coverage regardless of carrier.
Google Maps in Bangkok traffic uses around 5MB per hour. If you're using TikTok or posting Instagram Reels from the beach, that's 100–300MB per video upload. A 5GB plan covers 2 weeks of normal tourist use; go unlimited if you're a content creator or working remotely from a Koh Lanta villa.
Scan the QR code and connect immediately.
Share data with your laptop.
Keep your original number for calls.
OVOSIM offers the best value eSIM for Thailand starting at €3.49. It connects to AIS for 5G speed.
Plans start from €3.49 for 1GB. There are no hidden fees or roaming charges.
Yes, the eSIM activates instantly upon arrival. You will have 5G data immediately.
Ovosim connects to AIS (Advanced Info Service), consistently ranked Thailand's fastest and most reliable network by Opensignal. It covers all major tourist destinations including Bangkok, Phuket, Chiang Mai, Koh Samui, and Koh Phangan.
Yes. AIS has the strongest island coverage in Thailand, with good 4G/5G at the piers, beaches, and main towns. You will lose signal in open water between islands.
Yes — and this is one of the top reasons travellers buy an eSIM before landing. Grab requires a data connection to book rides. With Ovosim active before landing, you can book your airport transfer before you reach the arrivals hall.
Yes. A 7-day tourist SIM from AIS at BKK airport costs 299 THB (around €8). Ovosim's 7-day plan starts at €5.99 and you avoid the 45-minute queue.
AIS has the best rural coverage in Thailand, but remote mountain areas near Pai and the Golden Triangle will have intermittent 3G. Download offline maps before heading to these areas.
Don't lose connection when crossing the border. One click to see plans for neighbors:
