Thailand eSIM guide: mobile data for your trip
With a travel eSIM you can be online in Thailand as soon as you land in Bangkok, Phuket or Chiang Mai. It is especially useful for ride-hailing apps, ferry schedules and maps when you move between cities and islands.
Mobile networks in Thailand
Thailand's main operators are AIS and True (which merged with dtac in 2023). Coverage is strong in Bangkok, major cities and popular tourist areas, with 5G available in many urban centers.
On popular islands such as Koh Samui, Koh Phangan and Phuket coverage is generally good, while smaller islands, national parks and boat crossings can have weaker signal.
How much data do you need in Thailand?
Ride-hailing, maps and messaging apps are the essentials. For two weeks of island hopping with regular social media use, 10 to 20 GB is a comfortable range. Digital nomads working remotely should consider larger or unlimited plans.
Practical tips for Thailand
- Ride-hailing apps like Grab work best with reliable mobile data.
- Check ferry and minivan times online, as schedules can change with the season.
- Download offline maps for islands and national parks with limited signal.
- Keep your banking app available on your home SIM for verification texts.
Setting up your eSIM before departure
Install your eSIM at home on Wi-Fi and leave it switched off. On arrival, activate the eSIM line, enable data roaming for it and select it for mobile data. Your home number keeps receiving calls and texts if you leave it enabled.