You need mobile data in Thailand. Grab, Google Maps and LINE all depend on it, and LINE in particular is not optional — hotels, restaurants and tour operators use it instead of email.
The decision is smaller than most guides make it. Local SIM or eSIM, and if eSIM, which of about six providers. What actually separates them is not price, it is the daily throttle limit, and almost nobody puts that in a table.
Prices below were checked on 3 September 2026. Thai operators change tourist packages several times a year and eSIM providers run near-permanent sales, so treat every figure as a starting point rather than a quote.
Two Networks, Three Brands
The old advice about “the three Thai networks” is out of date. True and DTAC merged in 2023 into True Corporation. There are now two networks: AIS and True.
Three brands still sell tourist products:
- AIS — the largest network, best rural and island coverage. In Opensignal’s June 2025 report on Thailand it took five outright category wins, more than anyone else.
- TrueMove H — True’s main brand. Strong in cities, fast 5G, full package lineup.
- DTAC — now the entry-level range within True. Cheaper, and it rides the same infrastructure.
For Pattaya itself the distinction barely matters; all of them give you fast 4G and 5G across the city and on Koh Larn. It starts to matter on remote islands and inland east of Sukhumvit, where AIS holds up best.
Local SIM at the Airport
Still the cheapest way to get connected, and the only way to get a Thai phone number.
Bring your passport. Thai law requires every SIM to be registered to an identity document. The counters in the arrivals halls at Suvarnabhumi, Don Mueang and U-Tapao will install and test the card before you walk away.
What it costs: tourist packages run roughly 299 to 1,199 THB depending on validity, which is the range all the operators sit in. The cheap end is a short validity with a data allowance; the top end is a 30-day unlimited plan.
A warning about the word “unlimited.” It is used loosely. The widely quoted 299 THB eight-day package is reported as 15 GB rather than genuinely unlimited, and the plans that are sold as unlimited apply a daily fair-use cap and then slow you down. Ask at the counter what the daily allowance is before you pick — that number matters more than the headline.
We are not publishing a package-by-package price table. Operators change these several times a year, and a table that looks precise and is six months stale is worse than a range you know to verify.
Local eSIM — The Option Most Guides Skip
This is the gap in nearly every Thailand connectivity guide, including our own previous version: the Thai operators sell eSIMs directly. You do not have to choose between a physical SIM and an international reseller.
AIS sells tourist eSIM plans through its own online store. There are four, differing only in validity from 5 to 30 days, and all of them carry unlimited data plus unlimited calls within the AIS network. You buy online, get an activation email, and you are on Thailand’s best-covered network without a reseller in the middle. You still need your passport and an eSIM-capable phone.
TrueMove H also sells eSIM plans, reported at around $10 for 10 GB and $12 for 50 GB over 10 days.
Why this matters: international eSIM providers do not run their own networks in Thailand. They resell AIS, TrueMove or DTAC capacity. Buying directly from the operator cuts out that layer, usually gets you more data for the money, and puts you on a known network rather than whichever one the reseller negotiated.
The trade-off is convenience. Reseller apps are slicker, support is in your language, and you can buy in your own currency without a Thai payment method. If that is worth a few dollars to you, the section below is for you.
International eSIMs, Compared
Prices as of 3 September 2026, for the common 10 GB / 30 days plan.
| Provider | 10 GB / 30 days | Network used | Daily cap |
|---|---|---|---|
| Nomad | $10.00 | AIS + DTAC | 2 GB, then 512 kbps |
| Saily | $10.99 | — | 5 GB |
| Airalo | $11.00 | AIS + TrueMove H | 3 GB, then ~1 Mbps |
| Ubigi | $12.00 | AIS + TrueMove H | None |
For larger allowances, Airalo’s 20 GB / 30 days is around $18 and Saily’s around $19.99.
On unlimited plans: Holafly runs on TrueMove H and DTAC and prices 30 days at about $73.90 — roughly $2.46 a day, and close to triple what a 20 GB fixed plan costs. It does not publish its throttle policy. Nomad has offered 10 days unlimited at around $16 on sale.
The throttle limit is the real difference
Read that last column again, because it decides your experience more than the price does.
Ubigi is the only provider in this group with no daily cap. Everyone else slows you down after a set amount each day, and Nomad’s 2 GB then 512 kbps is restrictive if you use maps and video.
Two GB sounds generous until you spend a day navigating with Google Maps, video-calling home and scrolling social media on a hotspot. If you are working remotely or sharing a connection, the cap matters far more than four dollars of headline price.
A note on where eSIM rankings come from
Search “best eSIM for Thailand” and most of the top results are published by eSIM companies. Saily runs comparisons of Airalo and Holafly. Nomad publishes a “best eSIM for Thailand” guide. Holafly reviews AIS.
They are not necessarily wrong, and the underlying prices are usually accurate. But a ranking written by a company that sells one of the options is not a neutral ranking, and the recommendation at the bottom is rarely a surprise. Check the throttle limit and the network yourself.
To be straight about our own position: we have affiliate links to Airalo and Saily, and none to Nomad, Ubigi or Holafly. That is a commercial fact, not a ranking. Ubigi is still the only one of the five without a daily cap, and buying an eSIM directly from AIS is still usually better value than any reseller — both of those sentences cost us money to write, and both stay.
Which One Should You Actually Get
Get a local SIM at the airport if you are staying more than about a week, or you want a Thai phone number. You need a Thai number for Grab and food delivery registration, and it is what hotels and restaurants will ask for. It is also the cheapest option.
Get an AIS eSIM directly if your phone supports eSIM and you want the best network without the airport queue. This is the option we would pick for a two-week trip.
Get an international eSIM if you are here a few days, want data working the moment the plane lands, or do not want to deal with a Thai storefront. Pick on the daily cap, not the price.
That last point is not hypothetical. An eSIM needs no queue, no passport registration and no counter staff willing to serve you — which matters on the days a shop turns you away. For a long stay AIS is still the better buy; for landing on a schedule, an eSIM removes a failure point.
Get both if you are here for a longer stay: an eSIM for the first day, a local SIM once you have settled and can visit a shop without your luggage.
| Local SIM | Operator eSIM | Reseller eSIM | |
|---|---|---|---|
| Cost | Lowest | Low | Higher |
| Thai number | Yes | Usually | No |
| Setup | Passport, at a counter | Online, passport needed | Online, minutes |
| Network choice | Yours | Yours | Whatever they resell |
| Best for | Longer stays | Two weeks plus, eSIM phone | Short trips |
Buying a SIM Outside the Airport
If you did not grab one on arrival:
7-Eleven — most branches sell prepaid SIMs, usually True. Bring your passport.
It does not always work, and this is worth knowing before you rely on it. We have been turned away at a 7-Eleven and refused a SIM outright at a True shop, both recently and neither time with a reason given. Registration is a legal requirement and some counters simply will not do it for a foreigner. If your plan depends on being connected the day you land, do not make a shop your only plan.
Operator shops — AIS, True and DTAC all have branded stores in Terminal 21, Central Festival and along the main roads. Best option if you want help choosing or hit a technical problem.
Street phone shops — prices and legitimacy vary. Stick to official shops or 7-Eleven.
If You Are Here for Tomorrowland
Sort this before the festival week, not during it.
You need data for the shuttle, for Grab at closing time, for maps on a 237-acre site, and for topping up your festival bracelet. Network congestion inside a crowd of 50,000 is real, so agree a meeting point with your group and a fallback that does not depend on a live connection.
The airport counters will be busy in the days before 11 December. An eSIM activated before you fly avoids that entirely — see our Tomorrowland packing guide for the rest of the practical list.
Keeping Your Thai Number Long-Term
If you visit Thailand regularly, keeping a Thai SIM alive between trips costs almost nothing.
The rule is simple: every top-up extends validity by 30 days, and the minimum top-up is 10 THB. Top up once within the validity window and the number stays active.
Maximum validity is 12 months. If the SIM sees no activity for 12 months — no top-up, no call, no data — the number is permanently deleted along with any remaining credit.
Topping up from abroad: use the operator app (myAIS, True iService, the DTAC app) with an international card, or a remote top-up service. Roughly 120 THB a year keeps a Thai number alive from anywhere.
Why bother: your Grab account, LINE contacts, delivery apps and any banking registration stay intact between trips, and you land with a working number instead of starting over.
We use AIS and top up every few months. After years of visits, the same number makes everything smoother — drivers can call you, restaurants can confirm bookings, and your LINE contacts stay connected.
Coverage in Pattaya
Coverage across the city is genuinely good on both networks.
- 4G in Pattaya: roughly 20 to 80 Mbps, ample for video calls and streaming
- 5G: 100 to 300 Mbps where available — Terminal 21, Central Festival, the Beach Road area
- Koh Larn: 4G from both networks, slower than the mainland
- Inland east of Sukhumvit: thins out in places, and AIS is the most reliable there. Worth knowing if you are heading to Wisdom Valley in December
Quick Tips
- Unlock your phone before travelling. Carrier-locked handsets will not take a Thai SIM. Check before departure, or use an eSIM.
- Dual SIM lets you keep your home number live for bank verification codes while running Thai data.
- Download offline maps for the Pattaya area as a backup.
- WiFi is everywhere — hotels, malls, restaurants, most bars. Mobile data is for when you are moving.
- LINE is Thailand’s WhatsApp. Register with your Thai number to get the full benefit.
Frequently Asked Questions
Is a local SIM or an eSIM cheaper in Thailand?
A local SIM, usually by a wide margin. Tourist packages run 299 to 1,199 THB; international eSIMs start around $10 for 10 GB.
Can I buy an eSIM directly from a Thai operator?
Yes. AIS sells tourist eSIM plans through its own store with validity from 5 to 30 days, and TrueMove H sells eSIMs too. This is usually better value than a reseller and puts you on a known network.
Which eSIM has no daily data limit?
Of the main providers, Ubigi is the one that does not apply a daily cap. Airalo caps at 3 GB per day, Saily at 5 GB, and Nomad at 2 GB before throttling to 512 kbps.
Do I need a Thai phone number?
For Grab and food delivery registration, effectively yes. Most data-only eSIMs do not give you one.
Which network is best for Pattaya?
Any of them in the city. AIS if you are heading to islands or inland east of Sukhumvit.
Related Guides
- First Time in Pattaya
- Tomorrowland Thailand 2026: The Full Guide
- Thai Banking and QR Payments
- Bangkok to Pattaya Transport
- Currency Converter
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Pattaya.love Editorial Team
Local Experts since 2019
Our team of Pattaya-based writers, photographers, and long-term residents researches every guide on the ground. We visit venues, test routes, and verify every recommendation so you get actionable, up-to-date information you can trust.