Best eSIM for Thailand

Thailand operates on UTC+07:00, which means Bangkok is 7 hours ahead of the United Kingdom during winter and 6 hours ahead during British Summer Time. If you need to call home, early morning in London lines up with early afternoon in Thailand. For local calls, the country code is +66, and Thai mobile numbers typically start with 06, 08 or 09 after the prefix. Keep your home SIM active in dual SIM mode alongside your eSIM Asia data plan so you can still receive banking verification texts and two-factor authentication codes from your UK bank.

Thai script can be challenging to read, so download Google Translate with the Thai offline language pack before you land in Bangkok. The app's camera mode is particularly handy for translating street signs and restaurant menus written entirely in Thai. Grab is the essential ride-hailing app across Thailand, widely used in Bangkok, Chiang Mai and Phuket alike.

Thailand drives on the left-hand side, the same as the United Kingdom, which makes renting a car less daunting. Download offline maps covering routes between cities like Bangkok and Hua Hin or Chiang Mai and Pai, as GPS signal can drop in mountainous northern provinces. Having mobile data available ensures real-time navigation updates on winding highland roads.

Picking up a physical SIM card at Suvarnabhumi (BKK) or Don Mueang (DMK) airport is straightforward — AIS, DTAC and True Move all operate kiosks in the arrivals halls. However, Thai regulations require passport registration for every tourist SIM, meaning you must queue and hand over your documents, which can take 20 to 40 minutes during peak landing times late at night. Operator shops in Bangkok's MBK Center or CentralWorld offer the same plans but staff may speak limited English outside tourist hotspots like Phuket or Chiang Mai.

Renting a pocket Wi-Fi device is possible at BKK airport counters, though daily fees of around 150–200 THB add up quickly on longer stays. Free Wi-Fi is widely available in 7-Eleven branches, major shopping malls and most hotels, yet speeds in rural provinces like Isan or Kanchanaburi are often unreliable and public networks carry security risks.

UK roaming through EE, Three or Vodafone typically costs £2–6 per day, making a two-week trip expensive. An eSIM avoids all of this — no queuing at airports, no passport handover and instant activation before you even board your flight. If you plan to continue into neighbouring countries, consider pairing it with an eSIM for Cambodia for seamless cross-border connectivity.