Best eSIM for Thailand - Cheapest Tourist Plans

Best eSIM Providers for Thailand

eSIM plans in Thailand at a glance

How well each provider's eSIM works in Thailand

The Vefru score is our overall rating of the provider. The percentage shows how many reviewers said their eSIM worked well in Thailand. Since unhappy customers review more often, it is best used to compare providers with each other.

8.4Our score

Worked well in Thailand

100 of 107 reviewers

94%

Visit website Detailed review

7.2Our score

Worked well in Thailand

57 of 61 reviewers

93%

Visit website Detailed review

6.9Our score

Worked well in Thailand

37 of 41 reviewers

90%

Visit website Detailed review

7.1Our score

Worked well in Thailand

36 of 40 reviewers

90%

Visit website Detailed review

6.1Our score

Worked well in Thailand

23 of 26 reviewers

89%

Visit website Detailed review

8.0Our score

Worked well in Thailand

22 of 25 reviewers

88%

Visit website Detailed review

7.5Our score

Worked well in Thailand

41 of 49 reviewers

84%

Visit website Detailed review

6.6Our score

Worked well in Thailand

28 of 37 reviewers

76%

Visit website Detailed review

7.1Our score

Worked well in Thailand

12 of 12 reviewers

100%

Visit website Detailed review

7.1Our score

Worked well in Thailand

15 of 16 reviewers

94%

Visit website Detailed review

8.1Our score

Worked well in Thailand

15 of 17 reviewers

88%

Visit website Detailed review

6.3Our score

Worked well in Thailand

18 of 21 reviewers

86%

Visit website Detailed review

7.8Our score

Worked well in Thailand

8 of 10 reviewers

80%

Visit website Detailed review

8.8Our score

Worked well in Thailand

2 of 2 reviewers

100%

Visit website Detailed review

Compare all eSIM plans in Thailand

How we got these numbers: we read 464 public customer reviews that mention Thailand or a place in it, published between April 2023 and August 2026, and counted a report as "worked" when the reviewer said the eSIM connected, even with small hiccups. We treat 20 or more reports as strong evidence, 3 to 19 as limited, and fewer than 3 as too few to judge. A count like 23 of 25 means the eSIM worked well for 23 of the 25 travelers who reported from here; each provider section says what went wrong for the rest. The Vefru test score is a separate number: our own hands-on test of the provider, run outside Thailand, so it says how the provider behaves, not how the network performs here. Local operator prices in the text were checked on 14 October 2026; provider ratings, the plan tables and the price-per-GB chart are live and update on their own.

We ranked the Best group on traveler reports from Thailand first, price position in our comparison second, and our own hands-on test findings third; eSIM4Travel is in the group on its price and test results, with its 2 reports stated plainly.

Maya Mobile eSIM in Thailand: best record from most reports

8.4 /10

Vefru score Excellent Score details

• Purchase process9/10
• Mobile app8/10
• eSIM installation9/10
• Customer support6/10
• Speed test9/10
• Prices8/10
• Customer feedback9/10
• Coverage9/10

Average of eight categories from our own paid test and customer reviews.

Maya Mobile sells one product: a global unlimited eSIM plan for 165+ countries that you install once and switch on for every trip. It was fast in our test, and it is the cheapest global unlimited plan we have compared. There are no single-country plans, and nothing shorter than 3 days.

Key facts

• 165+ countries
• iPhone app 4.5
• Android app 4.7
• Auto Top-Up
• Hotspot
• 5.5 GB/day at full speed

Trustpilot

4.5/512,788 reviews

Payments

Credit or debit cardApple PayGoogle PayPayPal

Pros and cons

Pros 4 Cons 4

Cheapest global unlimited plan

Very fast: 785 Mbps on 5G

Worked for 91% of travelers

Quick checkout, many ways to pay

No country or short plans

Pushes auto top-up hard

Clunky WhatsApp support

“Unlimited” has a hidden daily limit

Maya Mobile eSIM in our hands

Go to Maya Mobile website View full review

Maya Mobile is the best option for most trips to Thailand because it has the strongest record from the largest number of reports, and the reports cover the hard places, not just Bangkok. It worked well for 100 of 107 travelers who reported from Thailand (94%), strong evidence. The successes describe 5G in Bangkok, Phuket and Chiang Mai, data on small islands, in the countryside and on multi-country Asia trips through Vietnam, Malaysia, Singapore and Cambodia. One traveler on 2 Apr 2024 said it "worked perfectly basically anywhere", island or jungle included, and several wrote that they had a better signal than companions on other eSIMs.

The 7 misses split into two kinds. Most were settings trouble on arrival: a wrong APN (the access point name the phone uses to reach data), or data that would not start until the eSIM was switched off and on, and in each of those cases the reviewer said the help desk fixed it within minutes by email or chat. The real failures are fewer: four eSIMs that never connected on one family trip in Jul 2026, a traveler in May 2025 with no service in Thailand or Vietnam, and two reports of slow 4G and 5G in 2025 and early 2026, one of them refunded in full. A few reviewers from 2025 and early 2026 said data cut out for hours or days before coming back.

Maya reworked its plans in May 2026: it now sells only a global unlimited plan, in 3, 7, 14 and 30 days, with a cruise version, and nothing shorter or smaller. Its fair-use rule is the most generous we tested: 5 GB a day at full speed, then slowed, with a daily reset, and the slowed speed still worked for maps and messaging in our test. Hotspot is included. Maya does not name its Thai network, and we could not confirm which one it uses. Our own test, run in Czechia, found a one-click install, 5G at once and a help desk that reaches a person after a form and a short wait, with template replies; the details are in our Maya Mobile review. On price it is the cheapest global unlimited plan in our comparison, and cheaper than most providers' Thailand-only unlimited plans, but it sells nothing for a two-day stopover or a 1 GB need. Plans are on the Maya Mobile site.

Nomad eSIM in Thailand: cheap data, no human help

7.2 /10

Vefru score Very good Score details

• Purchase process8/10
• Mobile app7/10
• eSIM installation8/10
• Customer support2/10
• Speed test8/10
• Prices7/10
• Customer feedback8.6/10
• Coverage9/10

Average of eight categories from our own paid test and customer reviews.

Nomad is a US travel eSIM brand run by LotusFlare, with plans for more than 200 destinations. It has a polished native app, fast data and prices close to the market average almost everywhere. Its weak spot is support: the chat is an AI bot with no route to a human.

Key facts

• 200+ destinations
• iPhone app 4.8
• Android app 4.5
• Top-ups
• Hotspot
• 2 GB/day cap

Trustpilot

4.3/544,625 reviews

Payments

Credit or debit cardApple PayGoogle PayPayPal

Pros and cons

Pros 4 Cons 4

Quick, easy purchase

Great app with a data widget

Fast, full-speed data

Fair prices almost everywhere

Support is a bot, no human

Easy to lose the install button

App stops when your data runs out

No refund after install

Nomad eSIM in our hands

Go to Nomad website View full review

Nomad is the pick for travelers who want a fixed data plan at a fair price and can solve small problems themselves. It worked well for 57 of 61 travelers who reported from Thailand (93%), strong evidence, and the record is second only to Maya's. The successes describe 5G from the moment the plane landed, reliable data in Bangkok, Pattaya, Phuket, Koh Samui, Koh Tao and Chonburi, and one install covering Singapore, Malaysia and Thailand. "As soon as I landed in Thailand, I had an internet connection," wrote one traveler on 20 Jun 2026, and many others say the same thing in fewer words.

The 4 misses, and some of the hiccups inside the successes, follow a pattern. One traveler in Jul 2026 had a solid signal in central Bangkok but repeated drops on the highway to Pattaya and almost nothing in Central Pattaya, a few kilometres from a beach where it worked. Another in Jul 2026 waited 45 minutes at the airport for the eSIM to connect, saw two network profiles to choose from and had the signal drop for stretches afterwards. A Thailand eSIM bought in Apr 2026 never connected while a partner's identical one did, and three days of chat did not fix it. Two reviewers in Aug 2026 believed the network gave locals priority. Several people on regional Southeast Asia plans said the data ran out far faster than expected and was slow when it ran, and a few mentioned restarting the phone when the network vanished.

Nomad's Thailand plans run from 1 GB for 3 or 7 days through 3, 5 and 10 GB for 30 days to a 50 GB plan for 10 days, plus unlimited plans for 10 and 30 days; in our comparison tool the 30-day unlimited plan is listed with a phone number. Nomad's page names True, AIS and dtac, allows hotspot use and gives you 60 days to activate [8]. Its own blog puts the fixed-data plans on AIS and dtac and the unlimited plans on True Move H, and its help pages say the True-supplied plans start the moment you install them, even outside Thailand, so install those at the airport, not at home. The app has a home-screen widget that shows your remaining data, which no rival offers, and the eSIM comes by QR code as well. The drawback is the help desk: in our test the bot looped on a settings question and there was no route to a person, as our Nomad review describes. On price Nomad sits just below the market average for Thailand. Plans are on the Nomad site.

Jetpac eSIM in Thailand: calls, hotspot, 4G-only unlimited

6.9 /10

Vefru score Good Score details

• Purchase process5/10
• Mobile app5/10
• eSIM installation9/10
• Customer support5/10
• Speed test8/10
• Prices5/10
• Customer feedback9.4/10
• Coverage9/10

Average of eight categories from our own paid test and customer reviews.

Jetpac is a Singapore eSIM provider with plans in 129 countries. It adds extras like in-app calls, free WhatsApp and Google Maps after your data runs out, and lounge access on delayed flights. Its website, app and support are rough, so it suits travelers who can fix small issues themselves.

Key facts

• 129 countries
• iPhone app 4.0
• Android app 4.1
• Top-ups
• Hotspot
• 3 GB/day cap

Trustpilot

4.7/53,528 reviews

Payments

Credit or debit cardApple PayGoogle Pay

Pros and cons

Pros 4 Cons 4

WhatsApp and Maps keep working without data

Unlimited hotspot

Cheap calls in the app

Free lounge if your flight is late

Slow website, confusing checkout

No top-up once your data runs out

Slow, technical support

Pricey for 3–20 GB

Jetpac eSIM in our hands

Go to Jetpac website View full review

Jetpac is the pick for travelers who want to make calls, share data with a laptop or keep WhatsApp and Grab working after the data runs out. It worked well for 37 of 41 travelers who reported from Thailand (90%), strong evidence. The successes describe 5G in Bangkok, Phuket and Koh Samui, a connection the moment the phone left airplane mode at the airport, hotspot sharing with a partner for a whole holiday, and one eSIM covering Bangkok, Phuket and Kuala Lumpur. "Also worked in Chiang Mai, Bangkok and Koh Samui," wrote a family of four on 5 Jul 2025.

The misses cluster around activation and outages. More than a third of all Jetpac reports from Thailand mention trouble getting the eSIM to connect on arrival, and most of those were fixed over WhatsApp within minutes by a named agent, which is why they count as successes; two travelers in Dec 2025 were not so lucky, one never got the eSIM to work at all and one lost data for most of a day in a network outage before being refunded. A traveler in Nov 2025 had an outage on day 21 of a 30-day plan and no WhatsApp reply for five days, while a Ubigi eSIM on the same network kept working. One reviewer in Apr 2026 bought an "unlimited" plan and found it crawled after 3 GB a day; the rule is on Jetpac's page, but not in the plan name. In Jul 2026 one traveler said a pack was activated without their consent.

Jetpac sells Thailand packs from 1 GB for 4 days to 40 GB for 30 days, and unlimited plans from 3 to 30 days. Its page says the unlimited plans give 3 GB every 24 hours at full speed and then slow down, and that packs of 3 GB or more keep WhatsApp chat, Google Maps, Uber and Grab working after the data is used up [9]. In our comparison tool the Thailand unlimited plans are flagged 4G only, while the Asia-Pacific unlimited plans are listed with 5G, and the network is listed as AIS, which third-party reviews also report; Jetpac's own page does not name it. Calls go through voice packs bought in the app, and an unactivated pack stays in your account for 3 months [9]. Hotspot is unlimited. In our test the install was automatic but the app was rough and the first reply from in-app chat took several minutes; see our Jetpac review. On price Jetpac is around the market average in Thailand. Plans are on the Jetpac site.

Holafly eSIM in Thailand: unlimited, capped speeds

7.1 /10

Vefru score Very good Score details

• Purchase process7/10
• Mobile app7/10
• eSIM installation9/10
• Customer support6/10
• Speed test4/10
• Prices5/10
• Customer feedback9.4/10
• Coverage9/10

Average of eight categories from our own paid test and customer reviews.

Holafly is an Irish eSIM provider built around unlimited data, with trip eSIMs for 200+ destinations. Travelers report it working more often than any other provider we track. Its weak points are speed and price: our test ran at about 30 Mbps on 5G, and its unlimited plans cost more than most.

Key facts

• 200+ destinations
• iPhone app 4.8
• Android app 4.7
• No top-ups
• Hotspot 1 GB/day
• 30 to 40 Mbps

Trustpilot

4.7/5113,513 reviews

Payments

Credit or debit cardApple PayGoogle PayPayPal

Pros and cons

Pros 4 Cons 4

Truly unlimited data

Most reliable we track: 92% worked

One-tap install, no QR code

6 months to refund an unused eSIM

Slow: about 30–40 Mbps on 5G

Pricier than other unlimited eSIMs

Saved our card without asking

No top-ups, buy a new eSIM instead

Holafly eSIM in our hands

Go to Holafly website View full review

Holafly is the pick for travelers who want unlimited data and do not want to think about it again, on the beaches and islands as much as in Bangkok. It worked well for 36 of 40 travelers who reported from Thailand (90%), strong evidence. The successes describe full 5G from Phuket through Khao Lak to Hua Hin, data from Bangkok to quieter island areas, family holidays with no data limit to watch, and Asia plans that kept working across Hong Kong, Vietnam and Thailand. "At all times we had full 5G connection wherever we were," wrote a couple who spent a month on the Andaman coast on 12 Jul 2026.

The misses are about speed and the bot. A traveler in Jun 2026 had almost no connection in Phuket and none in Bangkok, and got stuck in a loop with the chatbot. Another in Aug 2026 called the speeds in Thailand extremely slow and later gave up on Holafly after the same experience in Canada; a third in May 2026 said the connection was bad from landing and bought a local SIM. One eSIM activated in Bangkok stopped working, and a person on the help desk fixed it in about 10 minutes. The pattern matches our own test, where Holafly's speeds looked capped from the start on a 5G cell where a local SIM was far faster; see our Holafly review.

Holafly sells only unlimited Thailand plans, in 3, 5, 7, 10, 15 and 30 days, on True and DTAC, with hotspot sharing capped at 1 GB a day and a refund window of six months [5]. There are no top-ups: you buy a new eSIM when the days run out. Every eSIM keeps a free 1 GB a month after the plan ends, as listed in our comparison tool. On price it is the most expensive unlimited offer in most of our comparisons, so it suits a one-week beach trip better than a month of remote work. Plans are on the Holafly site.

ByteSIM eSIM in Thailand: cheap short trips, clumsy app

6.1 /10

Vefru score Good Score details

• Purchase process4/10
• Mobile app4/10
• eSIM installation7/10
• Customer support2/10
• Speed test8/10
• Prices5/10
• Customer feedback9.6/10
• Coverage9/10

Average of eight categories from our own paid test and customer reviews.

ByteSIM is a Hong Kong eSIM shop with a huge catalog: daily, fixed and unlimited plans for about 200 destinations. Data was fast in our test, and travelers report it working in 88% of cases. The checkout, the app and support were the weak points.

Key facts

• About 200 destinations
• iPhone app 4.6
• Android app 3.8
• No top-ups
• Hotspot
• 175 Mbps on 4G

Trustpilot

4.8/54,279 reviews

Payments

Credit or debit cardApple PayGoogle PayPayPal

Pros and cons

Pros 4 Cons 4

Cheap for 3–5 GB short trips

Fast 4G, no throttling

Worked for 88% of travelers

180 days to get a refund

Checkout asks for phone and address

Clunky app, auto-activation failed

Promises 5G, gave us only 4G

Support didn't reply in our test

ByteSIM eSIM in our hands

Go to ByteSIM website View full review

ByteSIM is a good choice for a short trip if you pay with a local wallet and do not mind a rough website. It worked well for 23 of 26 travelers who reported from Thailand (89%), strong evidence. The successes describe a 10-day unlimited plan with a good signal throughout, 5G almost everywhere in Thailand, Vietnam and Laos, coverage on remote islands, good data in Ayutthaya, and WhatsApp help that fixed a dead eSIM within 10 minutes of landing. Several reviewers say the fast WhatsApp reply is why they keep coming back.

The 3 misses, and the older complaints, are about speed and the help desk when things go wrong. A reviewer in Jan 2024 saw speeds drop far below what 5G should give, and one in Oct 2023 measured ByteSIM as the slowest of three SIMs across Bangkok and was blamed for using up a daily allowance. In Jan 2026 an eSIM did not auto-install, the agent refused to escalate and the traveler bought a True eSIM in a shop in three minutes instead. One plan expired at midnight after four days of a five-day pack, because ByteSIM counts days to midnight in its own time zone, as its reply confirmed. In May 2024 a second data failure got no answer at all.

ByteSIM has the largest Thailand catalogue in our comparison: fixed plans from 1 GB to 90 GB at validities from 1 to 30 days, daily plans with 1 GB a day, and unlimited plans from 1 to 30 days, with the 8- and 10-day unlimited plans listed with a phone number. Its Thailand page names AIS and True, with the unlimited plans on True, as of October 2026 [10]. There are no top-ups, and it takes dozens of local payment methods. In our own test the checkout demanded a postal address, the app threw install errors and WhatsApp did not reply within 15 minutes, which is the opposite of what Thai travelers report, so we rate it a safe pick only for people who have bought an eSIM before; our ByteSIM review has the details. On price it is among the dearer providers in Thailand for larger plans but competitive for 3 to 5 GB on a short trip. Plans are on the ByteSIM site.

eSIM4Travel eSIM in Thailand: cheapest here, only 2 reports

8.8 /10

Vefru score Excellent Score details

• Purchase process8/10
• eSIM installation8/10
• Customer support10/10
• Speed test8/10
• Prices10/10
• Customer feedback8.8/10
• Coverage9/10

Average of seven categories from our own paid test and customer reviews. eSIM4Travel has no app, so we do not score one.

eSIM4Travel is a US eSIM seller with plans for 158 destinations and no app. It was the cheapest provider in our price database, and its support was the best we have tested. Without an app, you cannot reach the store to top up once your data runs out.

Key facts

• 158 destinations
• No app
• Web only
• Top-ups
• Hotspot
• No throttling

Trustpilot

4.4/5202 reviews

Payments

Credit or debit cardPayPalApple Pay

Pros and cons

Pros 4 Cons 4

Cheapest provider we track

Quick, helpful human support

Fast, no throttling

Website in 41 languages

No app: out of data, you need Wi‑Fi to top up

US dollars only, no Google Pay

Unlimited slows after 3 GB a day

No refund after 10% of data used

eSIM4Travel eSIM in our hands

Go to eSIM4Travel website View full review

eSIM4Travel is in the Best group because it is the cheapest provider in our Thailand comparison and the best-scored in our hands-on test, not because of its record here: only 2 travelers have reported from Thailand so far, both positive, which is too few to judge. Both reviews come from German-speaking travelers in 2025 who described a fast connection everywhere and an easy install, one of them calling it the best eSIM for Thailand they had used. That is encouraging, but it is not evidence of how it behaves on a Thai island.

What we can say comes from our own test, run in Switzerland: the eSIM installed from a QR code and worked right away, the help desk went from a short bot to a person in one click and solved the problem, and the purchase took four steps on the website with the QR code sent by email, so no app is needed. The downsides are the same everywhere: there is no app at all, no Google Pay, and once the data runs out you cannot reach the store without Wi-Fi. Our eSIM4Travel review has the screenshots.

For Thailand it sells plans from 1 GB (for 1 or 7 days) to 50 GB for 30 days, and unlimited plans from 3 to 30 days at 3 GB a day before slowing, listed in our comparison tool with DTAC and True. A South Asia plan covers Singapore, Malaysia, Thailand, Indonesia and Vietnam in one eSIM. Plans activate within 90 days and start on first connection, and hotspot is allowed. On price it is the cheapest in Thailand for 1 to 20 GB; its advantage fades at 50 GB. Plans are on the eSIM4Travel site.

Other eSIM Providers for Thailand

We tested all of these too. They sit here because of a weaker record in Thailand, fewer reports, a price position that does not help, or a finding from our own test that counts against them. Each one still suits someone, and the H3 says who.

Global YO eSIM in Thailand: second cheapest, slow help desk

8.0 /10

Vefru score Excellent Score details

• Purchase process8/10
• Mobile app8/10
• eSIM installation9/10
• Customer support5/10
• Speed test8/10
• Prices10/10
• Customer feedback8/10
• Coverage8/10

Average of eight categories from our own paid test and customer reviews.

Global YO is a US eSIM provider aimed at young travelers, with plans in 195 countries. It is the second cheapest provider in our price data, and buying and installing took minutes. Its weak spot is support: quick to answer, slow to help.

Key facts

• 195 countries
• iPhone app 4.5
• Android app 3.8
• Top-ups
• Hotspot
• Over 150 Mbps

Trustpilot

4.0/51,293 reviews

Payments

Credit or debit cardApple PayGoogle Pay

Pros and cons

Pros 4 Cons 4

Second cheapest we track

Buy and install in minutes

Apple Pay, Google Pay, social login

Hotspot and top-ups on every plan

Support is slow to actually help

App only, no buying on the web

App stops when your data runs out

Unclear refund rules

Global YO eSIM in our hands

Go to Global YO website View full review

Global YO is the budget choice for big data plans, with a good record and a help desk you should not count on. It worked well for 22 of 25 travelers who reported from Thailand (88%), strong evidence. The successes describe fast data in rural areas on a six-week trip through Southeast Asia, video calls for remote work, and one eSIM used across Thailand, Vietnam and Malaysia; "The data speeds were fast, even in rural areas," wrote one traveler on 26 Jan 2025. The 3 misses were total: one eSIM would not install at all in Aug 2025 and the chat kept disconnecting, one did not work on arrival in Apr 2025, and one traveler in Jul 2024 could not connect in Thailand, Vietnam or Cambodia on three separate plans.

Global YO sells Thailand plans from 1 GB for 3 days to 100 GB for 60 days, day plans listed as 1 GB a day at full speed, and no unlimited plan. Its Thailand page names AIS and warns that most eSIMs can be activated only once, so a deleted eSIM cannot be reinstalled [11]. You buy in the app, and the QR code then arrives by email. In our test the first reply from the help desk was a template after 10 minutes and the follow-up took over half an hour, which is why it is not a top pick; see our Global YO review. On price it is the second cheapest in Thailand, and the gap grows with plan size. Plans are on the Global YO site.

Airalo eSIM in Thailand: the most misses, easy app

7.5 /10

Vefru score Very good Score details

• Purchase process9/10
• Mobile app8/10
• eSIM installation9/10
• Customer support7/10
• Speed test7/10
• Prices5/10
• Customer feedback8.2/10
• Coverage7/10

Average of eight categories from our own paid test and customer reviews.

Airalo is an eSIM marketplace from Singapore with plans for 200+ destinations, some with calls and texts. It is easy to buy and install. But prices sit at the market median, and travelers report more failed connections than with any other provider we track.

Key facts

• 200+ destinations
• iPhone app 4.6
• Android app 4.3
• Top-ups
• Hotspot
• No cap on fixed plans

Trustpilot

4.1/545,721 reviews

Payments

Credit or debit cardApple PayGoogle PayPayPal

Pros and cons

Pros 4 Cons 4

Buy on the web, no app needed

Works right after install

Fast, no speed cap on fixed plans

Most plans with calls and texts

Average prices, not cheap

Lowest success rate we track: 72% worked

App stops when your data runs out

Clunky checkout, no QR download

Airalo eSIM in our hands

Go to Airalo website View full review

Airalo is the easiest eSIM to buy and install, but it has more failures from Thailand than any other provider here. It worked well for 41 of 49 travelers who reported from Thailand (84%), strong evidence. The successes describe Krabi, Phuket and Bangkok on one trip, data on ferries between the islands, long stays of a month or more, and families with three eSIMs; "Brilliant service all over Thailand, whilst travelling to Krabi, Phuket and Bangkok," wrote one traveler on 4 Aug 2026. The 8 misses are mostly dead eSIMs: an eSIM for a six-hour transit in Bangkok that never worked in Aug 2026, mobile data that switched itself off in Bangkok in Jul 2026, one that had not worked once since arrival, two refund disputes, and several reports of the internet shutting off several times a day or vanishing outside the Bangkok city limits. One child's eSIM only worked after the network was picked by hand.

Airalo's Thailand plans ("Maew") run from 1 GB to 50 GB over 3 to 30 days, with an unlimited plan from 3 to 30 days listed at 5 GB a day at full speed before slowing. The page shows True as the main network plus one it does not name, as of October 2026 [4]; third-party blogs have placed Airalo on AIS and on dtac at different times, and we could not confirm which. A reviewer in Aug 2026 said the Thailand plan with a local phone number had been withdrawn and the help desk could not say why. Regional Asialink plans and the global Discover+ plans with a US number also cover Thailand. On price Airalo is at the market average in Thailand. Our test found the smoothest purchase of any provider, which is why beginners like it, but the weakest country record of the 14 overall; see our Airalo review. Plans are on the Airalo site.

Yesim eSIM in Thailand: weakest record, Northeast misses

6.6 /10

Vefru score Good Score details

• Purchase process6/10
• Mobile app7/10
• eSIM installation8/10
• Customer support2/10
• Speed test8/10
• Prices5/10
• Customer feedback8.6/10
• Coverage8/10

Average of eight categories from our own paid test and customer reviews.

Yesim is a Swiss eSIM provider built around unlimited plans sold by the day, with one eSIM for 200+ destinations. Data was fast in our test. But its support was among the slowest we have tested, and its fixed-data country plans cost more than most rivals.

Key facts

• 200+ destinations
• iPhone app 4.6
• Android app 4.7
• Top-ups
• Hotspot
• Possible slowdown

Trustpilot

4.3/52,963 reviews

Payments

Credit or debit cardApple PayGoogle PayPayPal

Pros and cons

Pros 4 Cons 4

Fast data in our test

Unlimited plans by the day

Pay with PayPal, Klarna or crypto

Website in 44 languages

Among the slowest support we've tested

Pricey fixed-data country plans

No top-up once your data runs out

Signs you up for marketing emails

Yesim eSIM in our hands

Go to Yesim website View full review

Yesim has the lowest share of working reports of any provider with strong evidence from Thailand. It worked well for 28 of 37 travelers who reported from Thailand (76%). Where the reports name a place, the successes are in Bangkok, Phuket, Khao Lak and the Phi Phi Islands, and the misses are in the Northeast: Khon Kaen, Loei and Isan each produced a report that did not work. That fits the network picture, where the Northeast is the one region where every operator measures weakest, according to Opensignal.

Yesim sells Thailand mainly as unlimited data by the day, from 1 to 30 days, plus fixed plans from 500 MB to 50 GB and regional Asia and Southeast Asia bundles. Its terms say speed may be limited under the network operator's fair-use policy, with no threshold published, and it does not name its Thai network, as of our check in August 2026. In our test the plan started at purchase rather than at first use, so buy it close to the trip, and the help desk took 15 to 60 minutes per reply, among the slowest we tested; see our Yesim review. On price it is among the two most expensive providers in Thailand for fixed data. It still suits experienced users who want flexible day-by-day unlimited data in the big cities. Plans are on the Yesim site.

Roamless eSIM in Thailand: no misses, dear per GB

7.1 /10

Vefru score Very good Score details

• Purchase process5/10
• Mobile app7/10
• eSIM installation7/10
• Customer support7/10
• Speed test8/10
• Prices5/10
• Customer feedback9/10
• Coverage9/10

Average of eight categories from our own paid test and customer reviews.

Roamless is a US provider built around one global eSIM for 203 destinations, paid with pay-as-you-go credit. It was fast and unthrottled in our test, and travelers report it working in 91% of cases. Its weak point is buying: the website forces you into the app, and large data amounts cost more than most rivals.

Key facts

• 203 destinations
• iPhone app 4.8
• Android app 4.1
• Pay-as-you-go
• Unlimited hotspot
• No throttling

Trustpilot

4.5/51,746 reviews

Payments

Credit or debit cardApple PayGoogle Pay

Pros and cons

Pros 4 Cons 4

One eSIM for 200+ destinations

Fast, no throttling

Worked for 91% of travelers

Free 500 MB trial

Website pushes you into the app

We had to fix the APN to get data

Credit can expire after 12 months

Pricey for 10 GB and up

Roamless eSIM in our hands

Go to Roamless website View full review

Roamless is the one to keep on your phone if you hop between countries and use little data in each. It worked well for 12 of 12 travelers who reported from Thailand (100%), limited evidence. The successes describe data from the moment the plane landed, calls and data across Thailand, Australia and New Zealand on one credit balance, and top-ups through the Flex option with few drops. The complaints inside those reports are about cost and speed: one traveler in May 2026 paid far more for a month of data than a partner paid for an unlimited SIM at the airport, one in Nov 2025 found speeds too uneven for internet radio or video, and one missed having a phone number.

Roamless sells pay-as-you-go credit that never expires and fixed Thailand plans from 500 MB to 200 GB for 30 days, listed in our comparison tool as AIS with no throttling. There is no unlimited plan. Roamless does not name its Thai network on its page, and we could not confirm it. In-app VoIP calls and an optional second number are extras. In our test the preselected APN did not work and a manual switch fixed it, and the app kept a trickle of data at zero balance so you can top up without Wi-Fi; see our Roamless review. On price it is at the market average in Thailand for 1 GB and among the dearest for 10 GB and up, which is why it is not a pick for a data-heavy stay. Plans are on the Roamless site.

GigSky eSIM in Thailand: Visa perk, slower speeds reported

7.1 /10

Vefru score Very good Score details

• Purchase process7/10
• Mobile app6/10
• eSIM installation8/10
• Customer support9/10
• Speed test6/10
• Prices4/10
• Customer feedback8.6/10
• Coverage8/10

Average of eight categories from our own paid test and customer reviews.

GigSky is a US travel eSIM that works like its own operator, with plans for 190+ destinations plus cruise, ferry and in-flight plans. Its app stays partly online after your data runs out. But its fixed-data plans are the most expensive of the 12 providers we compared.

Key facts

• 190+ destinations
• iPhone app 4.5
• Android app 3.9
• Top-ups
• Hotspot
• 3.5 GB/day cap

Trustpilot

4.3/57,194 reviews

Payments

Credit or debit cardApple PayPayPal

Pros and cons

Pros 4 Cons 4

Buy more data even with none left

Cruise, ferry and in-flight plans

Human support answered right away

Cheap 1-day unlimited passes

Most expensive per GB we track

App required, no Google Pay

Clunky, web-like app

Less reliable than average

GigSky eSIM in our hands

Go to GigSky website View full review

GigSky is worth a look if your Visa card includes its free data plan or you are on a cruise, and in Thailand it is cheaper than it is almost anywhere else. It worked well for 15 of 16 travelers who reported from Thailand (94%), limited evidence. Most of the successes came through the Visa benefit: a free plan that connected on its own in Korea, Thailand and Japan, reliable data in Chiang Mai and Bangkok, no problems in Phuket, and coverage on the highway from Bangkok to Pattaya. The one miss was an app that did not work at all on a US carrier-locked Samsung in Nov 2025. The hiccups are about speed: one traveler saw only LTE in Phuket, Chiang Mai and Bangkok, one called the signal spotty and 4G only, and one hit the daily limit and found the slowed speed nearly unusable.

GigSky sells Thailand plans from 1 GB for 7 days to 20 GB for 90 days and 50 GB for 180 days, and a 1-day unlimited pass, with the Asia-Pacific and cruise plans also covering Thailand. Its coverage list named AIS, dtac, TriNet and TrueMove for Thailand when we checked in August 2026 [12], and its own blog puts the unlimited daily allowance at 2.5 GB. You must install the app to buy, and the app stays partly online after the data runs out, so you can buy more without Wi-Fi, which only Ubigi matched in our test; see our GigSky review. On price it is the dearest provider in our overall comparison but among the three cheapest in Thailand, where its plans are at market. Plans are on the GigSky site.

Saily eSIM in Thailand: best app, fewer reports

8.1 /10

Vefru score Excellent Score details

• Purchase process7/10
• Mobile app9/10
• eSIM installation9/10
• Customer support10/10
• Speed test8/10
• Prices4/10
• Customer feedback9.4/10
• Coverage8/10

Average of eight categories from our own paid test and customer reviews.

Saily is the travel eSIM from the company behind NordVPN, with plans for about 200 destinations. It has the smoothest install we have tested, a polished app and a built-in VPN. But prices run above the market in most big European destinations, and traveler reports sit below average.

Key facts

• About 200 destinations
• iPhone app 4.7
• Android app 4.5
• Top-ups
• Hotspot
• 3 or 5 GB/day cap

Trustpilot

4.7/531,741 reviews

Payments

Credit or debit cardApple PayGoogle Pay

Pros and cons

Pros 4 Cons 4

Easiest install we've tested

Fast 24/7 human support

Free VPN and ad blocker

Plan starts only when you land

Pricey in big European countries

App required, no eSIM by email

Less reliable than average

App stops when your data runs out

Saily eSIM in our hands

Go to Saily website View full review

Saily is the choice for a first eSIM, with the smoothest install and the best help desk in our test, and a Thailand record that is good but thin. It worked well for 15 of 17 travelers who reported from Thailand (88%), limited evidence. The successes describe a whole family's phones on one trip, data in several locations, and an install so simple that a hotel waiter in Patong did it in five minutes for a guest on 30 Mar 2026. The 2 misses: one traveler in Mar 2026 could not get online in the first hour at the airport, the airport Wi-Fi was too poor to reach the help desk, and they bought another eSIM; another in May 2026 watched a 3 GB plan drain in 40 minutes after landing and got no refund, which Saily put down to background app updates on a fresh 5G connection.

Saily sells Thailand plans of 1 GB for 7 days and 3 to 20 GB for 30 days, plus a 15-day unlimited plan with 5 GB a day at full speed before slowing; its page does not name the Thai network, allows unlimited hotspot and gives 180 days to activate [6]. The phone-number add-on is a US number, not a Thai one. The app can be blocked in some countries, so set it up before you fly. In our test the help desk reached a fast, respectful person and the install needed no QR code; see our Saily review. On price Saily is slightly above the market average in Thailand, which is closer to market than it manages in most popular destinations. Plans are on the Saily site.

Ubigi eSIM in Thailand: strong networks, no help desk

6.3 /10

Vefru score Good Score details

• Purchase process4/10
• Mobile app3/10
• eSIM installation8/10
• Customer support2/10
• Speed test9/10
• Prices7/10
• Customer feedback8.2/10
• Coverage9/10

Average of eight categories from our own paid test and customer reviews.

Ubigi is the travel eSIM brand of Paris operator Transatel, with one reusable eSIM for 200+ destinations. Data was fast in our test, and its 3 GB, 10 GB and 30-day unlimited plans are cheap. Its weak point is support: a chatbot that ends in an email ticket, with no live agent.

Key facts

• 200+ destinations
• iPhone app 4.6
• Android app 3.7
• Top-ups
• Hotspot
• 568 Mbps on 5G

Trustpilot

4.1/547,238 reviews

Payments

Credit or debit cardApple PayGoogle PayPayPal

Pros and cons

Pros 4 Cons 4

eSIM by email in a minute

Very fast: 568 Mbps on 5G

Cheap 3 GB, 10 GB and 30-day unlimited

Buy more data even with none left

No live support, only email tickets

Confusing website and app

Few plan sizes, no 20 GB

No refund after you scan the QR code

Ubigi eSIM in our hands

Go to Ubigi website View full review

Ubigi is the option for heavy data users who are comfortable with settings and will never need to ask for help. It worked well for 18 of 21 travelers who reported from Thailand (86%), limited evidence. The successes describe fast 5G across Bangkok, coverage on the islands around Phuket and on Samui, data the moment the plane landed at Don Mueang, and a business traveler running a VoIP app on it. The 3 misses: a month plan that cut off after 8 days in Phuket in Aug 2026, which Ubigi's reply put down to a data limit or a network registration error; a traveler in Jul 2026 who never got it working in two weeks; and one who expected to send texts on a data-only eSIM. One long-term user in Bangkok says the connection is unsteady in crowded or remote places.

Ubigi's Thailand plans are 1, 3, 10 and 25 GB over 7 to 30 days and unlimited plans for 7, 15 and 30 days. Its unlimited page names AIS and True Move, includes 60 GB at full speed before slowing, and says the plan expires if not activated within 6 months [7]. Hotspot is allowed on all plans and you can pick a local or home-country IP. In our test the site and app were the weakest of the 14 and a help ticket went unanswered for 24 hours, the worst outcome we recorded, which is why it is not a pick despite a strong network pair; see our Ubigi review. On price it is a little above the market average in Thailand but has the cheapest 30-day unlimited median in our comparison. Plans are on the Ubigi site.

GoMoWorld eSIM in Thailand: dearest here, manual start

7.8 /10

Vefru score Very good Score details

• Purchase process8/10
• Mobile app8/10
• eSIM installation8/10
• Customer support6/10
• Speed test10/10
• Prices7/10
• Customer feedback7.6/10
• Coverage8/10

Average of eight categories from our own paid test and customer reviews.

GoMoWorld is the travel eSIM brand of Irish operator eir, with plans in 202 countries. Every destination has the same four euro prices, and we saw no throttling at all. The catch is that everything happens in the app, and human support works only in office hours.

Key facts

• 202 countries
• iPhone app 4.8
• Android app 4.6
• Top-ups
• Hotspot
• No throttling

Trustpilot

3.8/51,987 reviews

Payments

Credit or debit cardApple PayGoogle Pay

Pros and cons

Pros 4 Cons 4

Very fast, no throttling

Among the cheapest from 5 GB

Clean, easy app

Start the plan when you land

App only, no QR code

Human support only in office hours

App stops when your data runs out

Weaker in the US, Japan and China

GoMoWorld eSIM in our hands

Go to GoMoWorld website View full review

GoMoWorld is the fastest and least throttled eSIM in our test, but Thailand is one of the countries where its flat euro prices buy the least data. It worked well for 8 of 10 travelers who reported from Thailand (80%), limited evidence. The successes describe good speeds in Chiang Mai, Bangkok and Pattaya once the APN was confirmed, and a plan that worked with ease after Cambodia. The misses are the GoMoWorld trap: an eSIM in Chiang Mai in Jan 2026 did nothing because the plan had never been started in the app, a traveler in Dec 2025 needed Wi-Fi and two restarts on both phones before it connected, and one Southeast Asia plan did not cover Laos, which cost a traveler two days of chat and half a refund.

GoMoWorld sells a 2.5 GB Thailand plan for 7 days and 12, 25 and 38 GB for 30 days, plus Southeast Asia plans from 1 to 15 GB flagged 4G in our comparison tool. There is no unlimited plan and no QR code: the eSIM lives in the app, one account serves one device, and nothing happens until you press Start, which also means an unstarted plan never expires. Its network is reported as AIS by a third-party blog only. In our test the help desk was a good bot with people available in office hours, and speeds were the highest we measured; see our GoMoWorld review. On price it is the most expensive provider in our Thailand comparison. Plans are on the GoMoWorld site.

Providers travelers report from Thailand that we have not tested

Travelers also write about Simify from Thailand, mostly positive reports of coverage in Bangkok, Phuket and Koh Samui and an Australian help desk, but we have not tested it and it is not in our report count, so it is not ranked here.

Best eSIM Plans for Thailand

Price per GB in Thailand by eSIM Provider

How much does each provider charge per GB in Thailand? The chart below compares plans of 1 to 10 GB that last 6 to 14 days, the usual range for a one- or two-week trip. Provider websites show only their own plans, so this side-by-side view is one you would otherwise have to calculate yourself. A shorter bar means a lower price per GB.

The tables below are live and sorted by price per tier. For a short city break 2 GB covers maps and messaging; a week of social media and video calls lands around 5 to 10 GB; 20 GB suits a long stay or a laptop on hotspot. Unlimited plans in Thailand all carry a daily allowance before slowing, except Holafly, which publishes no number but looked capped in our test, and Ubigi, which slows after 60 GB in total. If Thailand is one stop on a longer trip, our Vietnam guide and Philippines guide cover the next ones, and you can compare plans that cover Thailand and Vietnam together in one search.

Best eSIM for Bangkok, Phuket, Chiang Mai and the islands

The place-level reports say the same thing as the networks section: in Bangkok almost everything works, Phuket produces the slow-data complaints, and the few misses outside the tourist belt sit in the Northeast. The table lists every place named in 3 or more reports, with the raw counts per provider. Nomad's one Central Pattaya failure and its Jomtien Beach success came from the same traveler on the same day, which is as good a picture of patchy coverage as a review can give.

Best eSIM for Bangkok

Jetpac is the pick for Bangkok: all 5 travelers who named the city reported it worked, with 5G from the airport, and Nomad is a close second at 9 of 10. Bangkok is where the networks are closest, and the reports show it: 39 of 43 place-level reports worked, across eleven providers. The misses are Airalo's, mostly. Two Airalo users in 2026 had an eSIM that did nothing, one for a six-hour transit at the airport and one whose mobile data kept switching itself off, and one that had not worked once since arrival; another had no network in some areas on the edge of the city until they came back inside it. Holafly's one Bangkok miss was a traveler with nothing at all in the city and minimal connectivity in Phuket, and Nomad's was an eSIM that would not connect while a partner's identical one did.

At the airports the reports are good: Nomad, Jetpac, Airalo, GigSky and Ubigi users all describe data the moment they switched airplane mode off at Suvarnabhumi or Don Mueang. Two Jetpac travelers needed WhatsApp help to activate on arrival, which the help desk sorted before they reached the hotel. A reviewer who used GigSky from the airport to Pattaya reported coverage along the whole highway, where a Nomad user found the signal dropping on the same road.

Best eSIM for Phuket

No provider has 3 reports from Phuket, so the country pick applies, and Maya Mobile's two Phuket reports both worked. The 19 reports from Phuket and Patong show a pattern that matters: none of the three misses was a dead eSIM from the start. One Airalo user found the Phuket eSIM useless while the same brand was fine in Vietnam, a Holafly user had minimal connectivity on the island, and a Ubigi user's month plan cut off after 8 days there in Aug 2026. The successes include full 5G on Holafly from Phuket to Khao Lak, a Jetpac eSIM that reached 5G after two reinstalls, and Ubigi coverage on the small islands off Phuket.

Phuket airport has official AIS, True and dtac counters in arrivals, and a Saily user in Patong had the hotel waiter set the eSIM up in five minutes rather than buy a tourist SIM. If you continue to Koh Phi Phi or Khao Lak, the reports are too few to judge: one Yesim user had data on Phi Phi and Holafly and Yesim each worked once in Khao Lak.

Best eSIM for Chiang Mai and the North

No provider has 3 reports from Chiang Mai, so the country pick applies; Jetpac and GigSky each worked twice there and Maya Mobile once. The one miss was a GoMoWorld plan in Jan 2026 that had never been started in the app, not a coverage failure. For the North beyond Chiang Mai, Pai and Mae Hong Son, there are no traveler reports yet; third-party travel tests place AIS ahead of True and dtac there, and in the June 2025 Opensignal report AIS won the national coverage measure by a clear margin. That favours Ubigi, GigSky, ByteSIM and Nomad's fixed-data plans, which list AIS, over Holafly, eSIM4Travel and Nomad's unlimited plans, which run on True and dtac. Further east, the three Yesim misses in Khon Kaen, Loei and Isan are the only reports from the Northeast, where Opensignal measures the weakest consistency for every operator.

Local SIM Cards and Operator eSIMs in Thailand

A Thailand SIM card for tourists from True or dtac beats every travel eSIM here on one thing: unlimited data with no daily throttle, plus free local calls, for less than any travel eSIM's unlimited plan. True's tourist page lists the Thailand Tourist INFINITE SIM in 8, 15 and 30 days with unlimited data at the maximum available speed, free local calls of up to 15 minutes each, free Wi-Fi hotspots and some international credit, and a 10-day data-only tourist SIM that takes incoming calls and texts but cannot make outgoing ones. The only price on the page, as of 14 Oct 2026, is the Happy Tourist Infinite SIM at THB 449.00 for 8 days [2].

The rules are the catch. The SIM must be registered with a passport, you may hold at most 3 SIMs per person per brand, tourist SIMs may not exceed 60 days, and the validity cannot be extended by topping up; once it expires you re-identify with a passport in a True dtac Shop or through the call centre [2]. Out-of-bundle use is priced at THB 5.00 per minute for local calls and THB 2.00 per MB for data, excluding VAT; after a tourist data package ends you pay per MB or dial a short code for 3 GB over 8 days at THB 150.00 including VAT [2]. AIS's tourist page, as we read it on 30 Aug 2026, carried the matching NBTC notice: to use a tourist SIM beyond 60 days you reconfirm your identity by texting your passport number to 4444161 or in an AIS shop, and a number must be activated within 60 days of registration [3]. AIS's own tourist prices did not render on its page; travel press reported an AIS tourist SIM at THB 299.00 for 8 days with 15 GB and THB 599.00 for 15 days with 30 GB in March 2026, with 7% VAT on top of quoted rates.

Where to buy: official AIS, True and dtac counters in the arrivals halls at Suvarnabhumi, Don Mueang, Phuket and Chiang Mai, with True's airport points open 24 hours [2]; operator shops in every town; and 7-Eleven, Family Mart and mini-marts for SIMs and top-ups. Registration at the airport counter takes 10 to 30 minutes with your passport and now includes a biometric check, according to travel press and law-firm summaries of the NBTC rules, and airport counter prices are reported to carry a premium over city shops, which we could not confirm against operator pricing. One Jetpac reviewer in Nov 2024 found a cheap dtac 30-day promotion sold out at several 7-Elevens and bought an eSIM instead. A locally issued eSIM with outgoing calls now also needs the in-person passport check, per one Thai-number reseller's own page, while data-only travel eSIMs are roaming profiles and skip Thai registration entirely.

The rule of thumb: a local SIM wins for a week or more of unlimited data, for a local number, and for any stay past 30 days (within the 60-day cap). A travel eSIM wins for small allowances of 1 to 10 GB, where eSIM4Travel, Nomad and Saily undercut any tourist package, for data from the moment you land (the digital arrival card and the Grab app both want it before you reach the counter), and for skipping the passport queue. Airalo, Nomad and Roamless reviewers who did the sums all said the local SIM was cheaper for a month of heavy use.

Mobile Networks in Thailand

Thailand has two network groups that matter and the choice between them matters most outside Bangkok. AIS is the largest operator by brand; True Corporation runs both TrueMove H and dtac since the two companies merged on 1 Mar 2023, sharing one infrastructure, and the state operator NT is tiny and used by no travel eSIM in our comparison. The regulator is the NBTC, which sets the SIM registration and spectrum rules [1]. According to Opensignal's June 2025 report, AIS won the coverage experience measure outright by a full point and led on consistent quality, 5G availability and upload speed, while download speed was a three-way tie and dtac led on reliability and video. Opensignal's August 2026 report then gave the "Best Network" title to dtac and True on their combined network, for reliability and download speed, with AIS keeping consistent quality. In plain words: for a Bangkok trip the network hardly matters; the further you go into the islands, the North or national parks, the more the reach of AIS counts, and the Northeast is the one region where every operator measures weakest.

Which network you get depends on the provider and sometimes on the plan. Ubigi names AIS and True Move [7], GigSky's coverage list named AIS, dtac, TriNet and TrueMove when we checked in August 2026 [12], ByteSIM's page names AIS and True with the unlimited plans on True [10], and Global YO names AIS [11]. Nomad's page names True, AIS and dtac [8], and its blog splits them: fixed-data plans on AIS and dtac, unlimited plans on True Move H. Holafly runs on True and DTAC [5], Airalo shows True plus one network it does not name [4], and eSIM4Travel's plans are listed with DTAC and True in our comparison tool. Jetpac and GoMoWorld are placed on AIS by third-party reviews only. Saily, Yesim, Maya Mobile and Roamless do not name a Thai network on their pages, and we could not confirm theirs; a third-party field test in June 2026 connected Saily through TrueMove H, including on Koh Yao Noi. Every mapping here is a snapshot: Airalo's network has moved between dtac, AIS and True over the years, so check the plan page before a trip that leaves the cities.

On technology, more than 97% of Thai connections already run on 4G or 5G, according to Opensignal, and both AIS and True claim 5G across well over 90% of the population; the 2G and 3G switch-off has been ordered in principle for 2026 but we could not confirm it has happened. Known weak spots named by travel press, Koh Tao, Koh Lipe, the Pai loop, remote beaches on smaller islands, national parks and the Myanmar and Cambodia border zones, are reported, not verified by operator or regulator data. If your trip includes those, the reports in the city section point to the AIS-listed providers and to Maya Mobile, whose reviewers describe small-island and jungle coverage without naming the network. Our guide to eSIMs with several networks and how to switch operator explains the manual network selection that fixed one Airalo eSIM in the reports.

How to Set Up an eSIM for Thailand

Install at home, start on landing, and know which providers break that rule. The activation windows are generous: Saily gives 180 days [6], Ubigi 6 months [7], Nomad 60 days [8] and Jetpac keeps an unactivated pack for 3 months [9]. The exceptions from our test and the reports: Yesim's plan started at purchase, GoMoWorld does nothing until you press Start in the app, some Airalo packages start at install, and Nomad's True-supplied Thailand plans start the moment you install them, so install those at the airport.

1. Check that your phone takes an eSIM and is unlocked. Several reviewers from Thailand bought eSIMs for iPhones bought in China, Hong Kong or Macao, most of which have no eSIM at all; our list of phones that take an eSIM covers the exceptions.
2. Buy before you fly and install over Wi-Fi at home: scan the QR code from the email (eSIM4Travel, Airalo, Maya Mobile, Ubigi, Yesim, ByteSIM, Jetpac, Nomad, Holafly) or let the app install it (Saily, GoMoWorld, Roamless, GigSky, Global YO). The iPhone guide and Samsung guide show the taps.
3. Keep the eSIM switched off until the plane lands, then turn it on, enable data roaming on that line, and set it as the data line while your home SIM keeps calls. A GigSky reviewer needed to toggle the physical SIM off before data flowed, and a Jetpac user had the same experience.
4. If there is no data after a few minutes, check the APN: Maya Mobile and Global YO use "globaldata", GigSky uses "gigsky", Ubigi uses "mobiledata", and in our Roamless test the preselected APN had to be replaced by hand. Wrong APN settings were the single most common fix in the Maya reports.
5. Still nothing? Pick the network by hand in your phone's network settings. One Airalo child's eSIM only worked after a manual switch, and GoMoWorld's own troubleshooting tells users to select AIS, TrueMove or dtac manually. Our eSIM troubleshooting guide goes through the rest.
6. File the Thailand Digital Arrival Card within 72 hours of arrival; it needs internet, which is a reason to have the eSIM working before the immigration queue.

Calls and SMS in Thailand

Thailand's calling code is +66, and most travel eSIMs here are data only, so calls go over WhatsApp, Grab's in-app chat or a VoIP app. Three providers in our comparison list a Thai number with a Thailand plan: Nomad's 30-day unlimited plan and ByteSIM's 8- and 10-day unlimited plans are listed with a phone number in our comparison tool, and ByteSIM's page title promises a Thai number [10]. Airalo's regional Discover+ plans include a US number, and an Airalo reviewer said the Thailand plan with a local number had been withdrawn by Aug 2026. Jetpac sells voice packs inside its app [9], though in our test the recipient saw a US number. Global YO's YO SHOUT and Roamless's in-app calling make outgoing VoIP calls, and Roamless and Saily sell a second number as an add-on, Saily's being a US number.

For a real Thai number with free local calls, the True or dtac tourist SIM is the answer: the INFINITE packages include free calls to all Thai networks up to 15 minutes each and some international credit, and calls after that cost THB 5.00 a minute before VAT [2]. One Airalo reviewer who could never receive texts on three trips had simply bought data-only plans, which is the norm; if a bank or booking site texts you a code, keep your home SIM active for SMS and use the eSIM for data.

Free eSIM Data for Thailand

Four providers in this article give some free data you can use in Thailand. Roamless lists a free Thailand eSIM with 500 MB for new users in our comparison tool, a 30-day trial that starts at activation. GigSky offers a free 100 MB trial plan for 7 days, and since 1 Apr 2026 some Visa cardholders get a free 1 GB or 5 GB plan that includes Thailand; several of the GigSky reports from Thailand came from people using it. Nomad's 1 GB Thailand plan for 3 days is listed as a trial plan, Jetpac gives a free 100 MB starter eSIM, and GoMoWorld has a free one-day trial. Holafly adds a free 1 GB a month to every eSIM once the plan ends. Our guide to free eSIM data and trials says how to claim each one.

Summary: the best eSIM for Thailand

Maya Mobile is the best option for most trips to Thailand in 2026: it worked well for 100 of 107 travelers who reported from here, including islands and jungle, and its unlimited plan has the fairest daily allowance we tested; its weakness is that it sells nothing small or short. Nomad (57 of 61) is the fixed-data pick at a price just below market, with a bot for a help desk and unlimited plans that run on a different network from its data plans. Jetpac (37 of 41) is for travelers who call, share data or want WhatsApp and Grab to keep working after the data runs out, with 4G-only unlimited plans in Thailand. Holafly (36 of 40) suits people who want unlimited data on the beaches without watching a meter, at capped speeds and the dearest unlimited price.

ByteSIM (23 of 26) is a cheap short-trip choice with fast WhatsApp help in the reports, though our own test found a clumsy checkout and app. eSIM4Travel is the cheapest provider in our Thailand comparison and the best scored in our test, but with only 2 reports from Thailand, both positive, its record here is still unproven. Whichever you pick, install at home, start it on landing, and if your trip goes north of Chiang Mai or to the smaller islands, prefer a plan listed on AIS. That is the best eSIM for Thailand on the evidence we have, and the live tables above carry the prices.

Compare All eSIM Plans for Thailand

Every Thailand plan from the 14 providers in this article, in one comparison with live prices.