Thailand has excellent mobile coverage across its major cities, islands, and tourist resorts. The eSIM setup is fast, and coverage holds up well almost everywhere tourists actually go.
Thailand
Prathet Thai
8.8
★★★★☆
Coverage score
// Why get an eSIM
Saily vs. roaming on your home SIM
| SailyRECOMMENDED | Roaming | |
|---|---|---|
| Setup | 2 min, pre-trip | Automatic |
| Cost | Flat, upfront | Per-day, uncapped |
| Speed | Full local speed | Often throttled |
| Local number | No (data-only) | Keeps your number |
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⚡ POWER TIP
Activate your eSIM before landing at Suvarnabhumi (Bangkok) or Phuket International. True Move H gives consistently strong coverage on popular tourist island routes including Koh Samui and Koh Phangan.
✅ VPN FULLY LEGAL
No law bans personal VPN use in Thailand. The government does block some websites, so a VPN is genuinely useful here — not just good practice. See our coverage and internet notes below.
⏱ Facts verified July 2026 • Always confirm regulations before travel
// Network operators
True Move H
One of Thailand's two largest networks. Excellent coverage across Bangkok, Phuket, Chiang Mai, and major tourist islands. The Saily Asia & Oceania plan connects through True Move H in Thailand. 4G/5G in cities. eSIM supported.
AIS (Advanced Info Service)
Thailand's oldest and largest network by subscriber count. Strong nationwide coverage including rural areas and northern provinces. Good backup option. 5G live in Bangkok and major cities. eSIM supported on tourist plans.
// What to expect
Cities and tourist resorts
Bangkok, Phuket, Pattaya, Koh Samui, and Chiang Mai all have excellent 4G and growing 5G coverage. Signal is reliable on beaches, at temples, and in shopping areas. You will rarely struggle to get data in places most tourists visit.
Jungles and remote highlands
The northern highlands near Chiang Rai, deep national parks like Khao Yai, and remote areas of Isan have genuinely patchy signal. Coverage exists along highways but drops off quickly once you leave the main roads. Download offline maps before heading anywhere remote.
💡 Island hopping note
Ferry routes between islands often have no signal, and smaller islands can have limited coverage. The main tourist islands (Samui, Phangan, Phi Phi, Lipe) all have reasonable coverage in their populated areas. The gap comes on smaller, less-visited islands and in open water between them.
// Practical tips
Emergency number: 191
The Thai tourist police number is 1155 — available 24 hours in English and more useful than 191 for tourist incidents. Standard police is 191, ambulance is 1669. Save all three before you land.
Some websites are blocked
Thailand blocks thousands of URLs under its Computer Crime Act — mostly gambling, adult content, and political sites. Mainstream apps like WhatsApp, Google, Facebook, and Netflix are unrestricted. A VPN is legal and useful if you need to access anything on the blocked list.
QR code payments are everywhere
Thailand runs on QR code payments for everything from street food to taxis. Your eSIM data is what makes this possible when you're away from WiFi. Keep your eSIM active even in markets and on transit — offline is a real inconvenience here.
// Travel security
Protect your identity abroad
Hotel WiFi, café networks, and resort hotspots carry the same risks anywhere in the world. Avoid banking and sensitive logins on public networks. Use your eSIM data instead, and since VPNs are unrestricted and useful in Thailand, running one on public WiFi is worth doing.
Alternative ID for local apps
Ride apps, food delivery, hotel portals, and tourist booking sites all ask for real personal details. Using a disposable identity and email for sign-ups keeps your real information out of databases you will never interact with again after your trip.
Surfshark Alternative ID
Generate a disposable identity for every app you sign up to abroad. Your real details stay private.