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Koh Samui eSIM for 7 days
$4.29
3 GB, valid 15 days on AIS. Enough for maps, rides, messages and photos for a week.
Choose 7 daysPay, then open NUM: your install code is waiting in your chat, and we email it about five minutes after you pay. If we can’t issue it, you get a full refund.
The short answer
The best eSIM for Koh Samui, Thailand is the one that fits your trip and your networks. For two weeks of photos, maps and social, NUM picks 5 GB for 30 days at $5.59, as of 4 Nov 2026.
| Plans from | $0.79 on 4 Nov 2026 |
|---|---|
| Networks on local plans | TrueMove H, DTAC, AIS, True Move 4G |
| 7 days | 3 GB, 15 days, $4.29 |
| 14 days | 5 GB, 30 days, $5.59 |
| 30 days | 10 GB, 30 days, $7.69 |
| 45+ days | 20 GB, 90 days, $34.19 (regional plan, 20 countries) |
| Phone number | None, data only |
| Payment | Apple Pay, Google Pay or card |
A regional plan may list fewer networks here than a local plan. If you need a particular network, check that plan’s network list in the shop before you pay.
Coverage in Thailand: what to know
Reliable 4G along the main beaches; interior and some northern beaches can fall to 3G.
In Opensignal's June 2025 report AIS was the most awarded Thai operator, ahead of DTAC and TrueMove H. Tourist strips on Samui, Phuket and Koh Tao have usable 4G, but small islands, mountain roads and ferry crossings can lose signal. SIM registration applies to tourists.
Checked 3 Nov 2026. Source: insights.opensignal.com. Coverage changes, so check your route before you rely on it.
How it works
Pick your trip
Choose 7, 14 or 30 days. The shop picks the data for how you use your phone, and shows the networks.
Pay in seconds
Apple Pay, Google Pay or a card. Then open NUM and join free: your install code is waiting in your chat.
Install, then land online
Install at home on wifi with one tap, switch it on as the plane lands, and you’re online walking off. Your home number stays on for calls and codes.
Koh Samui eSIM for 7, 14 and 30 days
Koh Samui eSIM for 14 days
$5.59
5 GB, valid 30 days on AIS. Room for social, photos and a few video calls over two weeks.
Choose 14 daysKoh Samui eSIM for 30 days
$7.69
10 GB, valid 30 days on AIS. A month of everyday use, with some streaming and hotspot.
Choose 30 daysKoh Samui eSIM for longer trips
$34.19
20 GB, valid 90 days, a regional plan covering 20 countries. For long stays, remote work and heavy use.
Choose longer tripsNUM’s pick for each trip length on 4 Nov 2026, for photos, maps and social. Prices in US dollars; the price on the pay button is the price you pay.
Thailand data plans that work in Koh Samui
| Data | Valid for | Network | Price | Per GB |
|---|---|---|---|---|
| 500 MB | 7 days | TrueMove H 5G, DTAC 5G | $0.79 | $1.62 |
| 1 GB | 7 days | AIS 5G, DTAC 5G, TrueMove H 5G | $2.19 | $2.19 |
| 2 GB | 15 days | TrueMove H 5G, DTAC 5G | $2.99 | $1.50 |
| 3 GB | 15 days | AIS 5G, DTAC 5G, TrueMove H 5G | $4.29 | $1.43 |
| 3 GB | 30 days | AIS 5G, DTAC 5G, TrueMove H 5G | $4.49 | $1.50 |
| 5 GB | 30 days | AIS 5G, DTAC 5G, TrueMove H 5G | $5.59 | $1.12 |
13 plans in the shop on 4 Nov 2026; 6 shown, least money first. See every plan and today’s prices.
Thailand eSIM prices next to Saily and Airalo
NUMSailyAiralo
| Plan | NUM | Saily | Airalo |
|---|---|---|---|
| 1 GB · 7 days | $2.19 | $2.99 | — |
| 3 GB · 30 days | $4.49 | $5.99 | — |
| 5 GB · 30 days | $5.59 | $7.99 | $8.00 |
| 10 GB · 30 days | $7.69 | $10.99 | $11.00 |
| 20 GB · 30 days | $11.09 | $19.99 | $18.00 |
NUM’s price is the shop’s on 4 Nov 2026. Other brands’ prices as published by travelsimasia.com (checked 1 Aug 2026), esimdb.com (checked 1 Oct 2026), cloudwards.net (checked 1 Oct 2026). Prices change; each shop shows today’s.
How much data do you need in Koh Samui?
| How you use it | 7 days | 14 days | 30 days |
|---|---|---|---|
| Maps and messages | 1.4 GB | 2.8 GB | 6 GB |
| Plus social | 2.8 GB | 5.6 GB | 12 GB |
| Lots of video | 11 GB | 21 GB | 45 GB |
Across Koh Samui
The same plan covers you in Ko Samui, Samui, Chaweng, Lamai and Bophut, and on the way between them.
Planning Koh Samui
Questions people ask about a Koh Samui eSIM
Does a Thailand eSIM work in Koh Samui?
Yes. A Thailand eSIM runs on Thailand’s own networks (TrueMove H, DTAC, AIS, True Move 4G), so the same plan works in Koh Samui and everywhere else those networks reach in the country. There is no separate Koh Samui plan to buy.
How much does an eSIM for Koh Samui cost?
On 4 Nov 2026, Thailand plans started at $0.79 and went up to $37.19 for the biggest. NUM’s 7-day pick was 3 GB for $4.29. The shop always shows today’s price, and the price on the pay button is the price you pay.
How much data do I need for Koh Samui?
For a week of maps, rides, messages and photos most people use about 3 GB; for two weeks about 5 GB; for a month of social and video, 10 GB or more.
Can I use it as a hotspot?
Hotspot works on most plans, so one eSIM can get a laptop or a travel partner online too.
Why does my eSIM show another carrier’s name?
Many travel eSIMs are issued by one carrier and roam on local networks, so your phone can show the issuing carrier’s name while your data runs on a local network. Keep data roaming on for the eSIM.
Will it work on my phone?
Dial *#06# on the phone you’re taking. If you see an EID number, it takes an eSIM. Every iPhone from the XR and XS on does, and the SE from 2020, as do Google Pixel 3 and later and Samsung Galaxy S20 and later. The phone must be carrier-unlocked. Not sure? Text PHONE and your model and we’ll check.
When do I install it?
At home, on wifi, before you fly. Then switch it on when you land. Tell us your landing day and we text you the switch-on steps that morning.
Does it come with a phone number?
No. It’s a data-only eSIM. WhatsApp, LINE, iMessage and FaceTime all work over it, and your home number can stay on for calls and codes.
What if it doesn’t work?
If we can’t issue your eSIM, we refund you in full. If it won’t install or connect, text us and we help you get connected.
An eSIM with a Koh Samui concierge inside.
Text NUM a table for tonight, a driver at 6 am or a pharmacy that’s open now in Koh Samui. Any language, any hour, on the data you just bought.
Get my Koh Samui eSIM