eSpeedz Thailand eSIM plans start at $7.99 and run on AIS, Thailand's largest mobile network, so you're covered from Bangkok to Chiang Mai and the main islands. You buy online, get a QR code by email in minutes, install it before you fly, and the plan starts when your phone connects in Thailand.
Skip the SIM counter queue at Suvarnabhumi. Land, switch off airplane mode, and have a Grab booked before you reach baggage claim.
A typical Thailand trip is two or three weeks of Bangkok, a train or flight north to Chiang Mai, then a ferry hop around the islands. US carrier day passes charge you for every one of those days, and the bill climbs fast. A prepaid eSIM gives you a fixed amount of data for the whole trip, so there's no surprise when you get home.
You can buy a tourist SIM at the airport kiosks in Bangkok, and plenty of people do. The catch is timing. After a long-haul flight you join a line, hand over your passport for registration, and wait while staff set it up. Thailand tightened SIM registration rules in 2025, so it isn't a grab-and-go purchase. With an eSIM you've already done the setup at home on your own wifi.
Once you're there, data is what keeps the trip running. Grab and Bolt replace haggling with tuk-tuk drivers, Google Maps gets you through the BTS and MRT, and LINE is how many Thai guesthouses, dive shops and tour operators message you. Cafe and hotel wifi is easy to find in cities, but you'll want data on the street, on a songthaew, or on a beach in Krabi when you're figuring out the next boat. On longer ferry crossings and deep inside national parks, expect the signal to come and go.
Plans run on AIS in Thailand. Data-only, prepaid, no contract. Prices in USD.
| Plan | Data | Validity | Price (USD) |
|---|---|---|---|
| Thailand 3GB | 3GB | 30 days | $7.99 |
| Thailand 5GB | 5GB | 30 days | $8.99 |
| Thailand 10GB | 10GB | 30 days | $15.99 |
| Thailand 20GB | 20GB | 30 days | $26.99 |
| Thailand 50GB | 50GB | 10 days | $26.99 |
| Thailand 50GB | 50GB | 30 days | $101.99 |
| Singapore + Malaysia + Thailand 3GB | 3GB | 15 days | $8.99 |
| Singapore + Malaysia + Thailand 3GB | 3GB | 30 days | $9.99 |
| Singapore + Malaysia + Thailand 5GB | 5GB | 30 days | $14.99 |
| Singapore + Malaysia + Thailand 10GB | 10GB | 30 days | $24.99 |
| Singapore + Malaysia + Thailand 20GB | 20GB | 30 days | $42.99 |
Prices checked October 1, 2026. All prices in USD, one-time payment.
| Network | AIS |
|---|---|
| Phone number | Not included. Data only, your regular number keeps working for calls and texts |
| Validity starts | When the eSIM first connects in Thailand, not when you buy or install it |
| Delivery | QR code by email, usually in about 3 minutes |
| Top-ups | Not available on every plan |
| Phone needed | eSIM-compatible and carrier-unlocked |
| Multi-country option | Singapore + Malaysia + Thailand |
Plans run on AIS in Thailand. Popular stops for travelers:
For a week of Grab rides, maps, LINE messages and posting a few beach photos, 3GB to 5GB is usually plenty. Two weeks moving between Bangkok, the north and the islands is more like 10GB, especially if you're video calling home or uploading reels. If you're working remotely from a Chiang Mai cafe or hotspotting a laptop, go for 20GB, or the bigger 50GB option if you stream a lot. Hotel wifi can handle the heavy downloads, so your eSIM data goes further than you'd think.
November to February is the sweet spot for most of Thailand, with cooler, drier weather in Bangkok, the north and the Andaman coast around Phuket and Krabi. March to May gets seriously hot. The rainy season runs roughly June to October, though it usually means heavy afternoon showers rather than washed-out days, and the Gulf islands like Koh Samui follow a slightly different pattern with their wettest weeks later in the year.
Sources: tatnews.org · visasnews.com · tdac.immigration.go.th · traveltomtom.net · thailandknowledge.com · att.com. Information checked October 2026. Entry rules and fees change, so confirm with official sources before you travel.