eSIM for Thailand in 2026: prices, AIS and True networks, islands and activation
Photo: Ball CooleRAn eSIM for Thailand on eSIM SOS costs from $1.40 for 1 GB valid 7 days, runs on AIS or True, and is up and running two minutes after you land. This guide covers how much data a two-week holiday needs, where the signal is strong and where it is not, why an eSIM beats a SIM card from the airport, and what to do if there is no network after arrival.
How much an eSIM for Thailand costs
Plans form a "data × validity" matrix: the bigger the package, the cheaper each gigabyte. As of 4 September 2026 the eSIM for Thailand catalog lists 58 plans:
| Package | Validity | Price | Per GB |
|---|---|---|---|
| 1 GB | 7 days | $1.40 | $1.40 |
| 3 GB | 15 days | $3.40 | $1.13 |
| 5 GB | 30 days | $5.40 | $1.08 |
| 10 GB | 30 days | $9.40 | $0.94 |
| 20 GB | 30 days | $16.40 | $0.82 |
| up to 50 GB | up to 365 days | see catalog | from $0.32 |
Prices are in US dollars. International Visa and Mastercard are charged in dollars; Russian bank cards are charged in rubles at the Central Bank rate on the day of payment. The supplier catalog updates automatically, so exact prices are always on the country page.
For comparison, a tourist SIM card at Phuket or Bangkok airport usually costs 300–600 baht (roughly $9–18) for a package valid 8–15 days, sold against your passport and after a queue at the end of an overnight flight. Home-carrier roaming packages for Thailand are traditionally among the most expensive in Asia; check your own carrier's roaming page for current prices.
How much data to take for two weeks
A typical Thailand holiday is longer than a Turkish one: 10–14 days. Without video or tethering, two weeks fit into 5–7 GB: maps and Grab taxis use 50–100 MB a day, messengers and social feeds 200–400 MB, a translator and cafe search another 100 MB or so. If you plan stories, video calls home and sharing with a second phone, budget 1–2 GB a day, so a 20 GB package.
One large package is cheaper than two small ones: the per-gigabyte price of 20 GB is almost half that of 1 GB, and a top-up means a new QR code. If you travel as a couple, buy two profiles rather than tethering from one phone: tethering in the heat drains the battery fast.
Which network the eSIM uses in Thailand
Thailand has two large carriers: AIS and True, which merged with dtac in 2023. Travel eSIMs connect to one of them as a roaming profile. Once the line is on, the Thai network name appears in the status bar; the specific carrier is listed in each plan's description in the catalog.
The main standard is 4G/LTE, and 5G is available in Bangkok, Phuket and Pattaya if your phone supports it. Coverage in the resort areas is dense: Phuket, Pattaya, Samui, Koh Chang, Krabi and Ao Nang. It is weaker on small islands such as Phi Phi and Koh Lipe, on remote beaches and in the mountains around Pai and Chiang Mai. That is a limit of the networks themselves; local SIM cards have the same gaps there.
How to activate the eSIM in Thailand
Install the profile at home over Wi-Fi: scan the QR code from the email, wait for "Done", and do not turn the line on until you land. The validity period starts at the first connection to a Thai network, not at installation.
After landing:
- Open Settings → Cellular (on Android: Connections → SIM manager).
- Turn the new eSIM on and assign it to mobile data; keep your home SIM for calls and SMS.
- Turn on Data Roaming specifically for the eSIM line. Without it there will be no internet; this is the most common reason people contact support.
- If there is still no network after 2–3 minutes, toggle Airplane Mode off and on, then pick the network manually (AIS or TRUE-H).
The step-by-step instructions with screenshots are in how to activate an eSIM abroad, and the list of compatible phones will help you check your device. Phones bought on a carrier instalment plan may be locked to that carrier's SIM cards: check this before buying.
Do you need a passport or registration
A local SIM card in Thailand requires a passport: the carrier registers the number to the tourist. A travel eSIM works as a foreign carrier's roaming profile, so it needs neither a passport nor registration: the purchase takes two minutes online, with no queue at the airport.
How to pay
eSIM SOS accepts international Visa and Mastercard in US dollars, plus Russian bank cards, SBP and T-Pay in rubles. No registration or app is required: choose a plan, enter your email, pay, and the QR code appears on the confirmation page and arrives by email.
If the eSIM does not work because of the service or the supplier, the money is refunded in full. The only exception is an incompatible or carrier-locked phone.
eSIM or a SIM card from the airport
| eSIM SOS | Airport SIM | Home-carrier roaming | |
|---|---|---|---|
| Price for 5 GB a month | about $5.40 | $9–18 for 8–15 days | depends on the carrier |
| Where to get it | at home, in 2 minutes | in a queue, with a passport | in the carrier's app |
| When it works | right after landing | after purchase | immediately, at roaming rates |
| Registration | none | with a passport | none |
| Number for calls | no, data only | a Thai number | your home number |
The eSIM wins on price and on time. An airport SIM makes sense only if you need a Thai number, for example for local delivery services that confirm orders by SMS.
What to do if there is no internet
Check three things: the eSIM line is on, Data Roaming is on for that line, and that line is selected for mobile data. Then toggle Airplane Mode and pick the network manually. If that does not help, write to support on Telegram or by email: replies usually come within an hour during the day.
Ready for the trip? Choose the data and validity on the eSIM for Thailand page: the QR code arrives two minutes after payment.
FAQ
How much does an eSIM for Thailand cost?
On eSIM SOS, Thailand plans start at $1.40 for 1 GB valid 7 days. 5 GB for 30 days costs about $5.40, 10 GB for 30 days about $9.40, and the largest packages go up to 50 GB. International cards are charged in US dollars.
Which network does a travel eSIM use in Thailand?
The profile connects to one of the Thai carriers, AIS or True (merged with dtac), as a roaming profile. The network name appears in the status bar once the line is on, and the exact carrier is listed in each plan's description.
Does the eSIM work on the islands: Phuket, Samui, Phi Phi, Koh Chang?
On Phuket, Samui, Koh Chang and in the resort areas coverage is dense and 4G is reliable. On small islands such as Phi Phi and in the northern mountains the signal is weaker and may drop away from the villages. That is a limit of the networks, not of the eSIM.
Do I need a passport for an eSIM in Thailand?
No. Buying a local SIM card at the airport requires a passport, but a travel eSIM is bought online without registration: only an email address, where the QR code arrives.
Should I activate the eSIM before departure or after landing?
Install the profile at home over Wi-Fi by scanning the QR code, but turn the line on only after landing. The validity period starts at the first connection to a Thai network, not at installation, so installing early costs nothing.
How can I pay for an eSIM for Thailand?
eSIM SOS accepts international Visa and Mastercard in US dollars, plus Russian bank cards, SBP and T-Pay in rubles. No registration or app is needed.
Does the eSIM give me a Thai phone number?
No, it is a data-only plan. Calls and messages work through WhatsApp, Telegram and other messengers, and your home SIM stays in the phone for regular calls and SMS.