Thailand is cheap and easy to get online in, but the rules changed. Since August 2025, buying a SIM card in Thailand means a passport check and a live facial scan at the counter, and further rules in force since May 2026 require registration in person and cap foreign visitors at three SIMs per operator. That makes the choice between a travel eSIM and a local SIM more consequential than it used to be. This guide compares what Airalo, Holafly, Nomad, Ubigi, Saily and Trifa actually charge for Thailand, using prices read from each provider's own site in August 2026, and sets them against AIS and True tourist SIMs in baht and against carrier roaming at $10 to $12 a day. It also says plainly what we could not confirm, including whether Thailand's registration rules formally apply to foreign-issued travel eSIMs that connect by roaming, so you can see where the guidance is solid and where to check with your provider before you buy.
Table of Contents

Thailand is one of the easiest countries in Asia to stay connected in. Both national networks sell tourist packages, every major travel eSIM brand covers the country, and prices are low by global standards. The catch is that Thailand has tightened its SIM registration rules since 2025, and the paperwork now falls very differently depending on whether you buy locally or buy before you fly.
Here is the short version, using prices published by each provider and checked in August 2026. Figures are in US dollars because these providers list in USD; local Thai SIM prices are in baht, because that is what you hand over at the counter.
If you want | Best pick | Price | Why |
|---|---|---|---|
The cheapest possible short trip | Airalo, 1 GB / 3 days | $4.00 | Lowest published entry price of the providers we checked |
A normal week in Bangkok | Airalo, 5 GB / 7 days | $7.00 | Enough for maps, messaging and ride-hailing without rationing |
A month-long stay | Nomad, 10 GB / 30 days | $10.00 | Cheapest 30-day allowance we verified |
Unlimited data for a week | Airalo Unlimited, 7 days | $27.00 | Marginally cheaper than Holafly's 7-day unlimited at $27.50 |
Heavy use plus hotspot | Nomad, 50 GB / 10 days | $12.00 | The only provider we checked that publishes an uncapped hotspot policy |
A Thai phone number and calls | AIS Traveller SIM, 8 days | 299 THB | Physical SIM bought in Thailand; passport registration in person |
[Source: Airalo official, Nomad official, Holafly official, AIS official, accessed 2026-08]
One rule of thumb: buy a travel eSIM before you fly if your priority is walking out of the airport already online, and buy a local SIM only if you specifically need a Thai phone number for bookings, deliveries or a local business contact.
The table below covers the travel eSIM providers that consistently appear in Thailand search results, plus Trifa. Every price is the cheapest package we could confirm on the provider's own site or blog on 15 August 2026. Prices move, and several of these storefronts display your local currency automatically, so treat these as a reference point rather than a quote.
Provider | Thai network(s) | Cheapest published plan | Unlimited option | Hotspot policy |
|---|---|---|---|---|
Trifa | Not published | Check current plans in the app | Yes | Depends on the plan |
Airalo | True, plus one other network not named on the page | $4.00 (1 GB / 3 days) | Yes, from $11.50 (3 days) | Not published for Thailand |
Holafly | True / DTAC | $11.90 (unlimited / 3 days) | Yes, all plans | 1 GB per day |
Nomad | AIS and dtac; True Move H on unlimited plans | $5.00 (1 GB / 7 days) | Yes, from $16 (10 days) | Allowed on all plans, no cap |
Ubigi | AIS and True Move | $3.90 (1 GB / 7 days) | Yes | Data sharing allowed |
Saily | Not published | Not verified | Not verified | Not verified |
[Source: provider official sites, accessed 2026-08]
Trifa is a Japanese travel eSIM app covering 200 countries and regions. You choose a country, a data size and a number of days in the app, and the eSIM installs from the app itself — on iOS 17.4 and later with a single tap, with no QR code to scan. Trifa says purchase to working connection takes as little as three minutes.
Two features stand out for longer or repeat trips. A monthly subscription covers 116 countries with 10 GB a month and rollover of unused data up to 100 GB, with no lock-in, which suits people who pass through Southeast Asia several times a year. And family accounts let one person add up to seven others and top up their data remotely. Thailand prices vary by size and duration, so check the current plans in the app rather than a figure quoted elsewhere. [Source: Trifa official, accessed 2026-08]
Airalo has the deepest Thailand range here. Its published ladder starts at $4.00 for 1 GB over 3 days and runs through 3 GB / 7 days at $6.00, 5 GB / 7 days at $7.00, 10 GB / 30 days at $11.00, 20 GB / 30 days at $18.00 and 50 GB / 30 days at $27.50. Unlimited packages run from $11.50 for 3 days to $49.00 for 30 days. [Source: Airalo official, accessed 2026-08]
That granularity is the reason to pick Airalo: if your trip is six days and you are a light user, there is a package sized for it. The trade-off is that Airalo does not publish a hotspot policy on its Thailand pages, so check before you buy if tethering matters.
Holafly sells unlimited data only, priced purely by duration: $11.90 for 3 days, $20.50 for 5 days, $27.50 for 7 days, $36.50 for 10 days, $50.50 for 15 days and $73.90 for 30 days, running on True and DTAC. Hotspot sharing is allowed but capped at 1 GB per day. [Source: Holafly official, accessed 2026-08]
For a short trip where you will stream, video call and navigate without thinking about it, this is the simplest product to buy. For a 30-day stay it is the most expensive option here by a wide margin, and the daily hotspot cap makes it a poor fit if a laptop is your main device.
Nomad is the value pick for heavy data users: $5 for 1 GB over 7 days, $10 for 10 GB over 30 days, $12 for 50 GB over 10 days, and unlimited plans at $16 for 10 days, $21 for 15 days and $33 for 30 days. Data plans run on AIS and dtac; unlimited plans run on True Move H. [Source: Nomad official, accessed 2026-08]
Two details matter. Nomad states that hotspot is available on all plans with no cap, which makes it the obvious choice if you work from a laptop. And its unlimited plans are explicitly fair-use limited to 2 GB per day at full speed before throttling — honest labelling, but it means "unlimited" here is a daily allowance rather than a blank cheque.
Ubigi has the lowest entry price we verified: $3.90 for 1 GB over 7 days, running on AIS and True Move with data sharing allowed. [Source: Ubigi official, accessed 2026-08] It is also one of the few providers supported natively in some recent laptops and tablets, worth knowing if you travel with a cellular iPad.
Saily is the eSIM app built by Nord Security, the company behind NordVPN, and it bundles virtual location switching, ad blocking and web protection into the app. Nord Security describes it as offering data plans in more than 200 destinations. [Source: Nord Security official, accessed 2026-08] We could not read Saily's current Thailand price list from its own site on 15 August 2026, so rather than quote a number we cannot source, we have left the price out.
Thailand's two network groups also sell to visitors. AIS's Traveller SIM starts at 299 THB for 15 GB over 8 days, sold through AIS shops, retailers and online, and at Suvarnabhumi and Don Mueang airports. True's Thailand Tourist INFINITE SIM is 449 THB for 8 days of unlimited mobile internet over 5G and older networks, sold at True dtac Shops nationwide and at airport counters that True describes as offering 24-hour service. [Source: AIS official, True official, accessed 2026-08]
Both are physical SIM cards that must be registered against your passport in person. Travel marketplaces such as Klook also resell Thai operator SIMs and eSIMs with airport pickup; compare against the operator's own price before buying.
This is the part of Thailand travel connectivity that has changed most, and the part most English-language guides still do not mention. If you plan to buy a SIM after you land, read this before you decide.
Thailand's telecom regulator, the National Broadcasting and Telecommunications Commission (NBTC), now requires operators to verify identity with a real-time facial scan when a SIM is registered. The requirement took effect on 18 August 2025 and applies to new registrations and SIM swaps alike, at operator shops, authorised dealers and airport counters. It is a liveness check: it looks for movement and depth, so a photo or video of your face will not pass. [Source: Biometric Update, reporting on the NBTC measure, August 2025]
The measure was introduced as part of a wider push against telecom-enabled fraud. For a visitor, the practical effect is simple: buying a Thai SIM means standing at a counter with your passport while a staff member photographs your face and uploads the registration. It adds a few minutes.
A further NBTC notification took effect on 16 May 2026. Under it, registration must be completed in person at a branch or authorised dealer, and non-Thai nationals are limited to three SIM cards per service provider. Identity is verified primarily by passport. A registered SIM must also be activated within 60 days, or the holder has to re-verify in person before it will work. [Source: Tilleke & Gibbins analysis of the NBTC notification, accessed 2026-08]
Separately, a telecom law published in the Royal Gazette on 29 August 2025 capped tourist SIM validity at 60 days with no top-up extension; continued use after that requires a fresh registration. [Source: Nation Thailand, 31 August 2025]
The operators' own terms reflect all of this. True's Tourist INFINITE SIM conditions state that the number "must be registered using a valid passport in full compliance with NBTC regulations", with "a limit of no more than three SIMs per person per brand", and that "the validity must not exceed 60 days". [Source: True Corporation official terms, accessed 2026-08]
Here we have to be careful, because this is where most articles guess. The published rules govern SIMs registered with a Thai operator. A travel eSIM bought abroad from Airalo, Holafly, Nomad, Ubigi or Trifa connects through a roaming agreement with a Thai network rather than a retail registration in Thailand, and in practice travellers activate these on arrival without visiting a counter.
What we could not verify is a formal NBTC statement on whether foreign-issued roaming eSIMs fall inside or outside these rules. We looked and did not find one, and we are not going to assert an exemption no regulator has published. If certainty matters — for example, if you are staying longer than a short holiday — ask your eSIM provider what identity steps, if any, apply to their Thailand product before you buy.
Separately from anything to do with SIMs, all non-Thai nationals must submit a Thailand Digital Arrival Card before arriving. Thailand's Immigration Bureau states that "all Non-Thai Nationality is require to submit their traveling information prior to their arrival in Kingdom of Thailand", and that the card "should be submitted with in 3 days in advance of arriving in Thailand (including the date of arrival)" — a 72-hour window, not something you can file weeks ahead. Infants and children need their own submission. Crew are exempt, as are transit passengers who do not pass through immigration. [Source: Thailand Immigration Bureau official FAQ, accessed 2026-08]
Submit it only through the government site at tdac.immigration.go.th. Because the form needs an internet connection and sits inside the 72 hours before departure, it is a good argument for having your eSIM working before you leave home rather than after you land.
Four ways to get online in Thailand, compared on what actually differs between them.
Option | Typical cost | Where you get it | Setup | ID required in Thailand |
|---|---|---|---|---|
Travel eSIM | From $3.90 to $12 for a typical short trip | Online, before you fly | Install in the app or scan a QR code | No counter visit reported; formal position not published |
Local prepaid SIM | 299–449 THB for around 8 days | Operator shop, retailer or airport counter | Swap the physical SIM; staff activate it | Yes — passport plus facial scan |
Pocket Wi-Fi rental | Varies by rental company | Airport counter or pre-booked delivery | Switch the device on | Rental agreement and ID |
Carrier roaming | $10–12 per day | Nothing to collect | Switch roaming on | None |
[Source: provider and carrier official sites, accessed 2026-08]
The arithmetic is stark for anything longer than a day or two. A week of carrier roaming at $12 a day is $84. A week of unlimited eSIM data is $27.00–$27.50, and a week of 5 GB is $7.00. Roaming earns its price only on a one-night stopover, or when you must keep your own number reachable and cannot run a second line.
AIS states that its tourist packages are available at Suvarnabhumi and Don Mueang airports as well as at shops nationwide and online. True says its tourist SIMs are sold at True dtac Shops nationwide and at airport counters offering 24-hour service. [Source: AIS official, True official, accessed 2026-08]
Expect to hand over your passport and have your photo taken, per the rules above. The counters sit after baggage reclaim, so you cannot use them before immigration. We could not confirm counter arrangements or opening hours at Phuket, Chiang Mai or Koh Samui from official sources, so do not plan a late-night arrival at a regional airport around getting a SIM there.
If you would rather change nothing, here is what roaming costs from three carriers that publish a flat daily rate.
Carrier | Product | Price per day | Included |
|---|---|---|---|
Verizon (US) | TravelPass | $12 | Thailand is listed as a TravelPass country |
AT&T (US) | International Day Pass | $12, additional lines $6 | 210+ destinations |
Telstra (AU) | International Day Pass | AUD $10 | 2 GB per day; Thailand is in Zone 2 |
[Source: Verizon official, AT&T official, Telstra official, accessed 2026-08]
UK travellers should check their own destination list first: EE sells a Travel Data Pass starting from £2.72 a day, but its page does not confirm Thailand or state a data allowance, so verify in the app before you fly. [Source: EE official, accessed 2026-08]
Thailand has two large mobile network groups, and almost every travel eSIM you can buy runs on one of them.
AIS (Advanced Info Service) is one group. The other is True Corporation, formed when dtac and True completed their amalgamation on 1 March 2023 — the largest telecom merger in Southeast Asia by combined enterprise value. [Source: True Corporation investor relations, accessed 2026-08]
One point of confusion worth clearing up: the dtac brand did not disappear. True's own retail pages still use "True dtac Shop" and "True-dtac" branding as of August 2026, and eSIM providers still name dtac as a connecting network. If you see a plan advertised as running on dtac, that is the True group's network.
Both groups run 5G. True describes its tourist SIM as delivering "unlimited mobile internet via 5G/4G/3G/EDGE/GPRS at maximum available speed". [Source: True official, accessed 2026-08] In Bangkok, Phuket town, Chiang Mai and the main resort strips, expect a fast, unremarkable modern connection on a 5G-capable phone.
Coverage thins as you leave built-up areas. On the smaller islands, inside national parks and on boat crossings, expect to drop to 4G or lose signal entirely for stretches. This is normal and not a fault of your eSIM.
You will read confident claims that one operator is clearly better on the islands. We could not verify that from operator coverage data or from the regulator, so we are not repeating it. Do this instead: check the coverage map published by whichever network your eSIM uses for the specific islands on your itinerary, and download offline maps for Ko Tao, Ko Lipe, Ko Chang or any park you plan to hike before you leave a city.
It varies by provider and sometimes by plan. Holafly runs on True and DTAC. Ubigi runs on AIS and True Move. Nomad uses AIS and dtac for data plans and True Move H for unlimited plans. Airalo's Thailand page names True plus one other network it does not identify. [Source: provider official sites, accessed 2026-08] If a specific network matters to you, check the plan page before buying, not the provider's home page.
Four questions decide this, in roughly this order of importance.
Most travellers overbuy. Maps, messaging, ride-hailing and a normal amount of scrolling runs at roughly 500 MB to 1 GB a day. Streaming video on mobile data, uploading photo dumps and taking video calls push that to 2 GB or more.
Trip type | Length | Suggested data | Cheapest verified match |
|---|---|---|---|
Bangkok city break | 3 days | 3 GB | Airalo 3 GB / 3 days, $5.50 |
Standard holiday | 7 days | 5 GB | Airalo 5 GB / 7 days, $7.00 |
Island hopping, heavy photo and video use | 10 days | 50 GB or unlimited | Nomad 50 GB / 10 days, $12.00 |
Long stay or remote work | 30 days | 10 GB or unlimited | Nomad 10 GB / 30 days, $10.00 |
[Source: Airalo official, Nomad official, accessed 2026-08]
This is the question that most often turns a good plan into the wrong one: "unlimited" plans frequently limit hotspot use separately from the main allowance.
Nomad states hotspot is available on all plans with no cap. Ubigi permits data sharing. Holafly allows hotspot but caps it at 1 GB per day, which is fine for pulling up a map on a laptop and bad for a work day. Airalo does not publish a hotspot policy on its Thailand pages. Trifa's help documentation states that tethering availability differs by plan, so check the specific plan in the app rather than assuming. [Source: provider official sites and Trifa official help, accessed 2026-08] If two of you are sharing one plan, tethering is usually cheaper than a second eSIM — but only on a provider that permits it generously.
Read what "unlimited" means at each provider before paying for it. Nomad discloses that its unlimited Thailand plans give 2 GB a day at full speed and then throttle. Holafly sells unlimited-only plans and caps the shareable portion at 1 GB a day. [Source: Nomad official, Holafly official, accessed 2026-08]
For a seven-day trip, unlimited at $27 versus 5 GB at $7 is a $20 premium for not having to think about data. Good value if you stream on long transfers between Bangkok and the coast; poor value if you are out all day and mostly using maps.
Things go wrong at inconvenient times — an eSIM that will not attach to a network at 1 a.m. at Suvarnabhumi is the classic case. Check three things before buying: whether support is live chat or email only, whether it runs around the clock, and which languages it is staffed in. A 24-hour email queue is not the same as a live chat.
The process takes a few minutes, and almost every problem people hit comes from one of the three checks below rather than from the installation itself.
If your provider has an app with one-tap install and you are on iOS 17.4 or later, use it — it skips the QR code entirely. Trifa supports this. [Source: Trifa official help, accessed 2026-08] Otherwise:
Keep your home SIM installed and active if you want calls and SMS verification codes on your usual number — that is the point of dual SIM. Set the travel eSIM as your line for cellular data, and leave data roaming off on your home line so it cannot quietly rack up charges.
The wording differs between manufacturers, but the flow is the same.
Most travel eSIMs start their validity clock when they first connect to a Thai network, not when you buy them, so buying a few days early does not waste plan time. After landing, turn data roaming on for the travel eSIM specifically and select it as your mobile data line. If nothing connects after a few minutes, toggle airplane mode, then check the APN settings against what your provider supplied.
One thing to plan for: one eSIM plan installs on one device. If you travel with a cellular iPad as well as a phone, either buy a second plan or share the connection by hotspot — assuming your provider allows it. [Source: Trifa official, accessed 2026-08]
Trifa is a Japanese eSIM app covering 200 countries and regions, Thailand included. On the Japanese App Store it holds a 4.5-star rating from around 16,000 ratings — a large enough sample to be meaningful rather than a handful of launch reviews. [Source: App Store, accessed 2026-08]
What tends to make the difference is the setup path rather than the price. Everything happens in one app — choosing the country, buying, installing, checking remaining data and topping up — and on iOS 17.4 and later the eSIM installs with a single tap, with no QR code to photograph off a second screen. Trifa says purchase to working connection takes as little as three minutes. [Source: Trifa official, accessed 2026-08]
Trifa's in-app chat support is available 24 hours a day, 365 days a year. The team is staffed by Japanese-speaking agents, so English-only travellers may want to use translation tools when reaching out, but response time is fast and the chat sits inside the app you are already using. [Source: Trifa official, accessed 2026-08]
Two limits to be aware of: Trifa plans are data-only, so there is no Thai phone number, no voice calls and no SMS — use messaging apps for calls and keep your home SIM active if you need SMS codes. And tethering availability differs by plan, so if you intend to work from a laptop in Chiang Mai, check the specific plan before buying. [Source: Trifa official help, accessed 2026-08]
You can see current Thailand plans and pricing on the Trifa Thailand page, or read more about the app at trifa.co.
It depends on how much data you use. On published prices checked in August 2026, Ubigi is cheapest to start at $3.90 for 1 GB over 7 days, Airalo has the widest range of package sizes from $4.00, Nomad is best for heavy users and hotspot use at $12 for 50 GB over 10 days, and Holafly is the simplest unlimited product at $27.50 for 7 days. Trifa is worth considering if you want everything handled in one app with family account management and round-the-clock chat support.
For most trips, yes: it is far cheaper than roaming at $12 a day, and you land already connected. The downsides are narrow but real. Your phone must support eSIM and be unlocked. Travel eSIMs from these providers are data-only, so you get no Thai phone number. And if something goes wrong you cannot walk into a shop and have a person fix it — you are dealing with chat support.
Buy before you fly. Installing an eSIM requires an internet connection you will not have when you land, and the Thailand Digital Arrival Card has to be submitted within the 72 hours before arrival. Most travel eSIMs only start counting down validity when they first connect to a Thai network, so buying early costs you nothing.
If you want a physical SIM with a Thai number, AIS's Traveller SIM starts at 299 THB for 15 GB over 8 days and True's Tourist INFINITE SIM is 449 THB for 8 days of unlimited data. Both need in-person passport registration. AIS sells at Suvarnabhumi and Don Mueang airports among other locations; True sells at its shops nationwide and at airport counters it describes as running 24 hours. [Source: AIS official, True official, accessed 2026-08]
If you buy a SIM from a Thai operator, yes. Since 18 August 2025, Thai operators have had to verify identity with a real-time facial scan at registration, alongside your passport. Since 16 May 2026, registration must also be done in person, and non-Thai nationals are limited to three SIMs per operator. Travel eSIMs bought abroad connect by roaming rather than through a Thai retail registration, and travellers activate them without visiting a counter — but we could find no NBTC statement formally exempting foreign-issued roaming eSIMs, so confirm with your provider if this matters to you.
It depends entirely on the provider. Nomad allows hotspot on all plans with no cap. Ubigi permits data sharing. Holafly allows it but caps sharing at 1 GB per day. Airalo does not publish a Thailand hotspot policy. Trifa's help documentation says tethering availability differs by plan. If you plan to work from a laptop, treat the hotspot policy as the deciding factor rather than the headline price. [Source: provider official sites, accessed 2026-08]
The same providers serve Australia and bill in US dollars, so compare the USD prices above against Telstra's International Day Pass at AUD $10 a day for 2 GB, with Thailand in Zone 2. [Source: Telstra official, accessed 2026-08] For a 10-day trip that is AUD $100 of roaming against roughly $12–$16 for a Nomad plan covering the same period. If you need your Australian number reachable for calls, keep your home SIM active alongside the eSIM rather than paying for roaming data you will not use.

Writer
trifa Editorial Team (Travel Prep & Local Info)
We provide easy-to-understand guides for beginners on travel preparation and local information, including the best season to visit, what to pack, and what to be aware of while traveling abroad. When needed, we interview Trifa’s local staff and organize the content based on on-the-ground conditions. We also verify time-sensitive information—such as seasons, regulations, and business hours—using primary sources from public agencies, transportation operators, and official facilities, and we update articles when changes occur (the “Last updated” date is shown in each article).
Search by Category