10GB$9.99
one-off, no subscription
- 5G/LTE data on True's network
- Ideal for lighter trips
- Valid for 30 days from activation
- QR code delivered by email
eSIM & internet in
Koh Samui
A Gulf-coast island that manages both: proper beach resorts on the east side, and quiet coves, waterfalls and jungle roads five minutes inland. Here's how to stay online across all of it.
Getting mobile data in Koh Samui
Arriving by plane at USM or by ferry from Donsak, a pre-installed Thailand eSIM means you have maps and messaging working before you've found your transfer — useful on an island where taxi fares are negotiated.
- Chaweng, Lamai, Bophut, Maenam and the airport all have solid 5G/LTE coverage.
- Inland jungle roads, the south-west coves and the ferry crossings can lose signal entirely.
- Save your accommodation pin offline before setting off — addresses on Samui are vague at the best of times.
- Island-hopping to Koh Phangan or Koh Tao? The same eSIM keeps working; only the crossing itself is patchy.
Getting around Koh Samui
- One ring road circles the island; almost everything sits on or just off it.
- Songthaews run set routes along the ring road during the day and double as private taxis after dark.
- Ferries from Donsak on the mainland, plus fast boats to Koh Phangan and Koh Tao, run several times a day.
- Ride-hailing coverage is patchier than in Bangkok — your hotel can usually arrange a driver.
Chaweng, Lamai, Bophut and the airport have solid coverage. Inland jungle roads, the south-west coves and ferry crossings can lose signal, so save your accommodation pin offline before setting off.
Fisherman's Village
Bophut's old wooden shophouses are the most pleasant evening stroll on the island, with a Friday night market.
Inland by day
Na Muang waterfalls and the Secret Buddha Garden break up beach time. Roads are steep — take a driver if unsure.
Island hop
Koh Phangan is 30 minutes by fast boat, Koh Tao about 90. Both are easy day or overnight trips.
Thailand eSIM plans for Koh Samui
Every plan runs on True's nationwide 5G/LTE network, is valid for 30 days and activates on your first connection in Thailand.
20GB$14.99
one-off, no subscription
- 5G/LTE data on True's network
- Best for everyday use
- Valid for 30 days from activation
- QR code delivered by email
50GB$44.99
one-off, no subscription
- 5G/LTE data on True's network
- Best for heavy use
- Valid for 30 days from activation
- QR code delivered by email
Prices are set in USD. Other currencies are shown for guidance using a fixed reference rate and may differ slightly at checkout.
Heading to Koh Samui?
Get online
Install a Thailand eSIM before you fly and land with maps, rides and messages already working.