Koh Samui eSIM: what to know before you land
🇹🇭 Koh Samui, Thailand · USM · 7-day pick: 5 GB for $5.99
Landing in Koh Samui
- USM Samui
Samui Airport is a small open-air terminal mostly served by Bangkok Airways; many travellers instead fly to Surat Thani and take the ferry.
- Install the Thailand eSIM at home on Wi-Fi before you fly.
- When the plane lands at USM, turn on data roaming for the eSIM line, so maps and transport apps work from the arrivals hall.
- The days start counting on first connection in Thailand, not at purchase.
You'll need about 3.5 GB over 7 days. 5 GB covers it with room to spare.
Maps and messaging only? 3 GB · 30 days for $3.99.
Pay · $5.99Short stays in Koh Samui
| Stay | Maps & messaging | Plus socials & photos | Streaming & hotspot |
|---|---|---|---|
| 2 days | $2.99 1 GB · 7 daysneeds ~409 MB | $3.99 3 GB · 30 daysneeds ~1 GB | $3.99 3 GB · 30 daysneeds ~2.6 GB |
| 3 days | $2.99 1 GB · 7 daysneeds ~614 MB | $3.99 3 GB · 30 daysneeds ~1.5 GB | $7.99 Unlimited · 3 daysneeds ~3.9 GB |
| 4 days | $2.99 1 GB · 7 daysneeds ~819 MB | $3.99 3 GB · 30 daysneeds ~2 GB | $10.99 Unlimited · 5 daysneeds ~5.2 GB |
| 5 days | $3.99 3 GB · 30 daysneeds ~1 GB | $3.99 3 GB · 30 daysneeds ~2.5 GB | $10.99 Unlimited · 5 daysneeds ~6.5 GB |
| 7 days | $3.99 3 GB · 30 daysneeds ~1.4 GB | $5.99 5 GB · 30 daysneeds ~3.5 GB | $8.99 10 GB · 30 daysneeds ~9.1 GB |
Networks
The Thailand eSIM connects to AIS and True. All of them list 5G; a 5G phone uses it where the network has it, 4G elsewhere.
Also in Thailand
Bangkok · Chiang Mai · Krabi · Phuket
Going on from Koh Samui? Asia (18 countries), Global (202 countries) — cover Thailand too.
Questions about Koh Samui
Which airports serve Koh Samui?
Samui (USM). Samui Airport is a small open-air terminal mostly served by Bangkok Airways; many travellers instead fly to Surat Thani and take the ferry.
How much data do I need for 7 days in Koh Samui?
About 3.5 GB for maps, messaging, socials and photos (our estimate: 0.5 GB a day). Our pick is 5 GB · 30 days for $5.99. If you only need maps and messaging, 3 GB · 30 days for $3.99 is enough.
Can I be online as soon as I land at USM?
Yes, if you install the eSIM before you fly. Install it at home on Wi-Fi, then switch on data roaming for the eSIM line when you land; the plan's days start when it first connects to a network in Thailand.
Which networks will I use in Koh Samui?
The Thailand eSIM connects to AIS and True. All of them list 5G; a 5G phone uses it where the network has it, 4G elsewhere.