Best eSIM for Thailand in 2026: what a remote worker should actually buy

The best eSIM for Thailand in 2026 depends on how you use data. Nomad and Ubigi sell fixed gigabyte eSIMs built for tethering a laptop and tracking usage. Airalo and Holafly sell unlimited eSIMs that cap your speed after a daily threshold instead of a total. A local AIS, True or dtac tourist SIM undercuts all four once you accept an in person passport check. Every price below comes from the provider's own page, checked on 26 September 2026.

Which eSIM works best for laptop hotspot use in Thailand?

Nomad and Ubigi answer this directly, because both state a tethering policy on their own site instead of staying silent on it. Nomad's own Thailand page says its eSIMs support tethering and hotspot with no separate limit: the same data budget you buy covers phone use and a laptop hotspot equally. Nomad prices a fixed 10 GB for 30 days at EUR 8.71, and a 50 GB block for 10 days at EUR 10.45, running on the AIS, dtac or True network depending on the plan.

Ubigi states the same thing in different words: "data sharing allowed" appears on every Thailand plan page, including its 25 GB for 30 days at USD 24.90 and 3 GB for 15 days at USD 5.00, both running on AIS and True Move. Neither Nomad nor Ubigi advertises unlimited data for Thailand's fixed tier, so a laptop doing video calls and file uploads will use the allowance faster than a phone alone, and the point is to buy enough gigabytes rather than assume the word unlimited covers you.

How much do the main Thailand eSIMs cost for 15 and 30 days?

Unlimited and fixed data eSIMs are not priced the same way, so the table below keeps each provider's own terms rather than forcing a false match.

Airalo's own explainer on its Unlimited eSIM plans states that once a day passes 3 GB of use, speed drops to 1 Mbps until the following 24 hour reset, and that the same daily allowance covers hotspot use, so tethering a laptop does not carry a separate cap. Holafly's Thailand page states the reverse structure: instead of a speed drop, the amount you can share through a hotspot is capped at 1 GB a day, adding up to the plan length, so a 30 day plan can share up to 30 GB in total over the trip. Nomad shows its prices in EUR when checked from outside Thailand; convert to your own currency with the Currency Check before comparing.

Are local AIS, True or dtac SIMs cheaper than an eSIM?

Yes, for the same 15 or 30 day window, buying a Thai SIM in person is usually cheaper than an international eSIM once you accept the passport check at a counter. AIS's own tourist plan page lists 699 THB for 15 days and 1,199 THB for 30 days, both unlimited data at max speed on 5G or 4G, with no published tethering limit on that page. True's tourist Infinite SIM matches AIS on both durations: 699 THB for 15 days and 1,199 THB for 30 days, also unlimited. dtac's Happy Tourist eSIM is the cheapest of the three at 599 THB for 15 days, but it is a fixed 30 GB at max speed rather than unlimited; dtac's own tourist SIM page does not list a 30 day tier at that price point.

At the XE mid market rate checked on 26 September 2026 (33.41 THB to the US dollar), AIS and True's 30 day unlimited SIM comes to about USD 36, cheaper than Holafly's unlimited 30 day eSIM at USD 73.90 and close to Airalo's EUR 44. Ubigi's fixed 25 GB for 30 days at USD 24.90 undercuts every unlimited option, if 25 GB actually covers your month.

Do you need your passport to buy a SIM or eSIM in Thailand?

Yes. Under an NBTC notification published in the Government Gazette on 15 May 2026 and in force from 16 May 2026, identity verification for any SIM registered in Thailand runs primarily on a passport, registration happens in person at a branch or an authorised dealer, and a non Thai national is limited to three SIM cards per operator. A registered SIM that is not activated within 60 days needs the identity check repeated before it can be used. Buy the SIM on arrival or soon after, since the clock starts at registration, not at first use.

What should you check if your Thailand tourist SIM has no data?

Work through these five checks in order before assuming the SIM is faulty.

1. Confirm the SIM shows active in the operator's own app or a text reply, not just inserted: some tourist SIMs need one incoming call or a top up code first.
2. Check the APN settings match the operator's published values; a SIM moved from another phone often keeps the previous carrier's APN.
3. Confirm mobile data and data roaming are both switched on for that SIM, since a dual SIM phone can silently route data through the other slot.
4. Check the plan has not already been used up: a fixed data eSIM stops at zero, and some unlimited plans throttle hard enough to look broken.
5. Restart the phone once the SIM is active and the settings are correct. If data still fails, contact the operator directly rather than the shop that sold it.

Does coverage reach Koh Tao and the outer islands?

Mostly yes, and AIS reaches furthest. A Koh Tao guide updated 2 July 2026 reports that AIS has the widest and most dependable coverage on the island, including out to sea on the boat ride to dive sites such as Chumphon Pinnacle, Southwest Pinnacle and the HTMS Sattakut wreck. True and dtac cover the main beaches well but thin out faster on the steeper east coast roads and offshore. Signal drops once a diver submerges, whichever network sold the SIM. For the fuller picture of what loads on the island, read our Koh Tao internet post and the general internet guide.

Which SIM or eSIM should you actually buy?

Match the plan to the trip rather than the marketing word unlimited. A short trip under two weeks with a laptop in daily use fits Nomad's fixed 10 GB or Ubigi's 25 GB, both cheaper per gigabyte than an unlimited eSIM and both stating a clear hotspot policy. A longer stay where you would rather stop counting gigabytes fits Airalo, accepting the 1 Mbps floor after 3 GB a day, or Holafly if a 1 GB daily hotspot share is enough. If you are comfortable registering in person, AIS or True's unlimited tourist SIM beats every eSIM on price for 15 or 30 days, and dtac beats all of them at 15 days if 30 GB is plenty. Check how many days your entry actually allows with Visa Check for Thailand before you pay for 30 days you will not use, and our piece on what actually counts as legal remote work in Thailand covers the visa side of the same trip.

Updated on 26 September 2026. Rules and prices change: confirm with the official source linked above before you act.