Best eSIM for Thailand: Plans, Networks and Prices Compared

What plans cost

Thailand sits at the cheap end of the global eSIM market: small allowances cost a dollar or two, generous 30 day allowances land under the price of a beachfront lunch per week of travel, and unlimited plans are widely available and affordable by regional standards. Unlimited almost always carries a daily fair use threshold (commonly 1GB to 5GB of full speed data per day before throttling), which matters more in practice than the headline word. Regional bundles covering Thailand, Vietnam, Malaysia, Singapore and Indonesia remove re purchasing at each border on the classic Southeast Asia loop.

AIS or True underneath

Which local network the eSIM rides determines the experience more than the brand on the app. AIS reaches furthest into rural areas and the smaller islands; True Move H posts the fastest urban speeds. Providers usually state the partner network on the plan page; travellers heading beyond Bangkok, Chiang Mai and the major islands lean AIS, while city and resort trips barely notice the difference. 5G is strong in Bangkok and spreading, with dependable 4G elsewhere.

Practicalities

As across Asia, tourist eSIMs are data only: no Thai number, so calls run over apps and SMS verification to local numbers is unavailable. Installation happens before departure over WiFi, activation on landing or a set date, and the home SIM stays in for calls with roaming data off. For stays beyond a month or heavy hotspot use, local SIM cards from AIS and True shops with passport registration remain an alternative, at the cost of a queue on arrival.

Kaeltripton.com is an independent editorial publisher and is not authorised or regulated by the Financial Conduct Authority. This guide is informational only and is not financial or professional advice or a personal recommendation. Figures change; verify with each provider before acting. Prices are indicative at the time of writing and vary by provider and promotion.

Frequently asked questions

How much data do I need for Thailand?

Maps, messaging, translation and social use typically consume 500MB to 1GB a day. A 20GB month covers most travellers comfortably; heavy video calling or hotspot use points to unlimited plans with generous daily thresholds.

Which network is better, AIS or True?

AIS for rural reach and smaller islands; True Move H for peak city speeds. Both cover the mainstream tourist map well, and the provider's plan page states which network a given eSIM uses.

Do unlimited Thailand eSIMs really mean unlimited?

With a caveat: nearly all apply a daily full speed threshold, commonly 1GB to 5GB, then throttle until the next day. The threshold is the number to compare, not the word unlimited.

Can I get a Thai phone number on an eSIM?

Tourist travel eSIMs are data only. A local physical SIM from an AIS or True shop, registered against a passport, provides a Thai number where one is genuinely needed.

Does one eSIM cover a wider Southeast Asia trip?

Regional bundles covering Thailand with Vietnam, Malaysia, Singapore and Indonesia are widely available and cost little more than single country plans, which suits the standard multi country route.

Is 5G available?

Yes, strongly in Bangkok and increasingly in other cities, with reliable 4G across the islands and tourist regions. A 5G handset benefits in cities but 4G remains entirely adequate for travel use.

Sources

provider plan pages checked July 2026 · network coverage reporting for AIS and True Move H