Quick answerAiralo is the best overall pick for most Bangkok arrivals because it names True 5G and has clear fixed and unlimited plan prices. Saily is the budget-first option with live pricing in the app, and Yesim is the pick for unlimited data with a built-in VPN on plan pages. This guide covers QR install before boarding, BKK and DMK arrival setup, and how to choose among Airalo, Saily, Yesim, and Drimsim data-only eSIMs. Best overall: Airalo · Budget: Saily · Unlimited: Yesim · Pay-as-you-go: Drimsim
You land at Suvarnabhumi (BKK) or Don Mueang (DMK) and immediately need data: maps, ride-hailing, hotel messages, and a backup if you do not want to rely on airport Wi-Fi. The last thing you want is to queue for a local SIM before you can leave the terminal.
A travel eSIM solves the arrival problem if you set it up correctly. Airalo, Saily, Yesim, and Drimsim Thailand plans are data-only. They do not include a Thai (+66) phone number, voice, or SMS. For most travelers, that is fine for maps, chat, and booking rides, but it is not a replacement for a Thai number if you need calls or SMS.
This guide compares the four providers we cover for Thailand, explains QR install before boarding, and walks through what to do at BKK and DMK after landing. Prices are verified October 2026. Where a provider does not publish a verified figure, we say see live pricing.
Our Top Picks at a Glance
- 1. Airalo — Best overall for Bangkok arrival: clear prices and True 5G.
- 2. Saily — Budget-first pick with simple app setup and live pricing.
- 3. Yesim — Best for unlimited data and built-in VPN on plan pages.
- 4. Drimsim — Pay-as-you-go single SIM for multi-country trips.
Quick Comparison Table
| Provider | Best For | Data | Validity | Network | Thai Number | Price | CTA |
|---|---|---|---|---|---|---|---|
| Airalo | Best overall | 1-10 GB fixed or unlimited | 3-30 days | True 5G | No (data-only) | From $4.00; unlimited from $9.50 | See plans / live pricing |
| Saily | Budget / simple app | See live pricing | See live pricing | See provider details | No (data-only) | See live pricing | See plans / live pricing |
| Yesim | Unlimited + built-in VPN | Unlimited plans; pay-as-you-go | See live pricing | See provider details | No (data-only) | See live pricing | See plans / live pricing |
| Drimsim | Pay-as-you-go / multi-country | Pay for traffic used | See provider details | Worldwide network varies | No (data-only) | €10.00 SIM + pay-as-you-go | See plans / live pricing |
Prices verified October 2026. Live prices may differ — verify at checkout.
How We Tested
We verified prices on providers' own sites on 2026-10-11 and walked through each provider's checkout flow. We named networks only where providers name them: Airalo names True 5G in Thailand, while other providers should be checked in their apps or plan pages. We do not publish network performance test results or claim on-the-ground testing. Where a provider does not publish a verified figure, this guide uses see live pricing instead of a number. Datestamp: Prices verified October 2026.
In-Depth Reviews
1. Airalo — Best Overall — Best Overall
Data-only in Thailand | True 5G | Fixed plans from $4.00 | Unlimited plans from $9.50 | No Thai phone numberAiralo is the easiest recommendation for most Bangkok arrivals because the Thailand plan is clearly priced and the provider names True 5G as the network. If you land at BKK or DMK and just need data for maps, chat, and ride-hailing, a small fixed plan is usually enough for a short trip.
The fixed plans start at $4.00 for 1 GB / 3 days, which is a good fit for a layover or a very short arrival window. For a week in Bangkok, 3 GB / 7 days at $6.00 or 5 GB / 15 days at $7.50 gives more room without paying for unlimited.
If you stream, hotspot, or work remotely, Airalo's unlimited plans run from $9.50 for 3 days to $49.00 for 30 days. These are data-only plans: no Thai (+66) number, voice, or SMS. Install the eSIM before boarding if you want to be connected the moment you land, following Airalo's app instructions.
| Plan | Price |
|---|---|
| 1 GB / 3 days | $4.00 |
| 3 GB / 7 days | $6.00 |
| 5 GB / 15 days | $7.50 |
| 5 GB / 30 days | $8.00 |
| 10 GB / 30 days | $11.00 |
| Unlimited 3 days | $9.50 |
| Unlimited 5 days | $15.00 |
| Unlimited 7 days | $21.00 |
| Unlimited 10 days | $31.00 |
| Unlimited 15 days | $39.00 |
| Unlimited 30 days | $49.00 |
Pros
- Names True 5G network in Thailand.
- Clear fixed and unlimited pricing.
- Good short-trip and long-stay options.
- Data-only: no Thai phone number, voice, or SMS.
Cons
- Unlimited plans get expensive for longer stays.
- No Thai (+66) number for calls or SMS.
- Network performance can vary by location; check coverage needs.
See Airalo Thailand plans →
(affiliate link — we may earn a commission at no extra cost to you)
2. Saily — Best Budget — Best Budget
Data-only in Thailand | Simple app setup | Built-in ad blocker | See live pricing | No Thai phone numberSaily is the budget-first option in this guide. Pricing is not fixed in our verified data, so always check see live pricing in the app before buying. The setup is simple, which matters when you are buying at the last minute before a flight to Bangkok.
Saily's Thailand plans are data-only. No Thai (+66) number, voice, or SMS. That makes Saily a good fit for travelers who mainly need maps, messaging apps, email, and ride-hailing data at BKK or DMK.
If you want the lowest upfront cost and do not need unlimited data, Saily is worth checking. Compare the live price against Airalo's fixed plans before you buy, especially for trips longer than a week.
| Plan | Price |
|---|---|
| Thailand data plans | See live pricing |
Pros
- Budget-first positioning.
- Simple app setup.
- Built-in ad blocker.
- Data-only: no Thai phone number, voice, or SMS.
Cons
- No verified numeric price in this guide; use live pricing.
- Fewer published plan details than Airalo.
- No Thai (+66) number for calls or SMS.
See Saily live pricing →
(affiliate link — we may earn a commission at no extra cost to you)
3. Yesim — Best Unlimited — Best Unlimited
Data-only in Thailand | Unlimited data plans | Built-in VPN on plan pages | See live pricing | No Thai phone numberYesim is the pick if you want unlimited data and a built-in VPN on plan pages. For a Bangkok arrival, that can be useful if you plan to hotspot, stream, or work during your trip and do not want to track gigabytes.
Yesim Asia and Southeast Asia plans are data-only. No local Thai number, voice, or SMS. Do not choose Yesim if you need a Thai (+66) number for calls or SMS; use a local Thai carrier SIM/eSIM for that.
Pricing is not fixed in our verified data, so check see live pricing before buying. Compare Yesim's unlimited options with Airalo's unlimited plans if you are staying more than a few days.
| Plan | Price |
|---|---|
| Unlimited data plans | See live pricing |
| Pay-as-you-go mobile plans | See live pricing |
Pros
- Unlimited data plans.
- Built-in VPN on plan pages.
- Useful for heavy data use.
- Data-only: no Thai phone number, voice, or SMS.
Cons
- No verified numeric price in this guide; use live pricing.
- Built-in VPN may not replace a dedicated VPN for advanced needs.
- No Thai (+66) number for calls or SMS.
See Yesim live pricing →
(affiliate link — we may earn a commission at no extra cost to you)
4. Drimsim — Best Pay-As-You-Go — Best Pay-As-You-Go
Data-only in Thailand | €10.00 SIM | Pay only for traffic used | No monthly fees | ~190 countries | No Thai phone numberDrimsim is a pay-as-you-go eSIM that works worldwide, so it appeals if Thailand is one stop on a multi-country trip. The SIM costs €10.00, and you only pay for traffic you actually use. There are no monthly fees.
For a Bangkok arrival, Drimsim is less about a fixed Thailand plan and more about flexibility. It is data-only in Thailand. No Thai (+66) number, voice, or SMS. If you need a local Thai number, this is not the product for that.
Drimsim can be a good backup or a primary data line for light users who do not want to commit to a fixed package. Check live data rates and coverage in the app before you fly, especially if you will rely on hotspot or heavy streaming.
| Item | Price |
|---|---|
| SIM card | €10.00 |
| Data | Pay as you go - pay only for traffic used |
| Monthly fee | None |
Pros
- Single SIM works worldwide (~190 countries).
- Pay only for traffic used.
- No monthly fees.
- Data-only: no Thai phone number, voice, or SMS.
Cons
- Data rates are not fixed in this guide; check live pricing.
- Less convenient for heavy users than unlimited plans.
- No Thai (+66) number for calls or SMS.
See Drimsim live pricing →
(affiliate link — we may earn a commission at no extra cost to you)
How Much Data Do You Need in Thailand?
Use your trip length and how you will use data to pick a plan size. The recommendations below map to verified Airalo options; for Saily, Yesim, and Drimsim, check live pricing.
| Traveler type | Recommended plan from verified options | |---|---| | Short layover or 1-2 days | Airalo 1 GB / 3 days at $4.00 | | Light week-long trip | Airalo 3 GB / 7 days at $6.00 or 5 GB / 15 days at $7.50 | | Two-week trip with moderate use | Airalo 5 GB / 15 days at $7.50 or unlimited 15 days at $39.00 | | Month-long stay with heavy use | Airalo 10 GB / 30 days at $11.00 or unlimited 30 days at $49.00 | | Heavy streaming or hotspot use | Yesim unlimited plans or Airalo unlimited plans; check live pricing | | Multi-country trip | Drimsim pay-as-you-go; check live pricing |
eSIM vs Local Thai SIM Card
A travel eSIM such as Airalo, Saily, Yesim, or Drimsim is the easier choice for arrival because it is data-only and can be set up before you land for data-only travel eSIMs. It does not give you a Thai phone number, voice, or SMS.
A local Thai SIM or eSIM from AIS, DTAC, or TrueMove H is the route to a Thai number, calls, and SMS. For True via thailandesim.com, install only once you are in Thailand; outgoing calls and SMS require in-store passport KYC.
Choose a travel eSIM if you need data only and want to avoid queues. Choose a local Thai SIM/eSIM if you need a Thai (+66) number, voice, or SMS, or if you are staying long enough to justify local registration.
When a travel eSIM wins
You need data immediately at BKK or DMK, you do not need a Thai number, and you want to install before boarding.
When a local Thai SIM wins
You need a Thai (+66) number, voice, or SMS; you are staying long enough to handle registration; or you need in-store KYC for outgoing calls/SMS on True via thailandesim.com.
Bangkok Airport Arrival Setup: BKK and DMK
Before you fly, buy your data-only eSIM and install it following the provider's instructions. For Airalo, Saily, Yesim, and Drimsim, this is a data-only setup; no Thai (+66) number, voice, or SMS.
After landing at Suvarnabhumi (BKK) or Don Mueang (DMK), turn off airplane mode, make sure the eSIM line is enabled for data, and leave your home SIM active for SMS if your phone supports dual SIM. Thailand's main networks are AIS, DTAC, and TrueMove H. Airalo names True 5G in Thailand; for Saily, Yesim, and Drimsim, check the provider's app or plan page for network details.
If you need a Thai number, do not buy a data-only travel eSIM for that. Use a local Thai carrier SIM/eSIM. For True via thailandesim.com, install only once you are in Thailand; outgoing calls and SMS require in-store passport KYC.
QR install checklist before boarding
Buy the plan.
Install the eSIM profile.
Label the eSIM line.
Turn on data roaming if the provider instructs it.
Keep the QR code or activation details accessible.
At BKK or DMK after landing
Disable airplane mode.
Select the travel eSIM for mobile data.
Keep your primary SIM active for SMS if needed.
Open maps or a ride-hailing app to confirm data.
If it fails, restart your phone and check the provider's APN or network settings.
Coverage and Tethering Fine Print
Thailand's main mobile networks are AIS, DTAC, and TrueMove H. Airalo names True 5G for its Thailand plan. Saily, Yesim, and Drimsim do not name a specific Thai network in our verified facts, so check the provider's app or plan page before you buy if network matters to you.
Tethering and hotspot rules can vary by plan. Check the fine print in the provider's app before relying on your phone as a hotspot for a laptop or travel group. Unlimited plans may have different tethering conditions than fixed-data plans.
Remember: Airalo, Saily, Yesim, and Drimsim Thailand plans are data-only. No Thai (+66) number, voice, or SMS. If you need those features, use a local Thai carrier SIM/eSIM and complete the required passport KYC for outgoing calls/SMS with True via thailandesim.com.
How to Choose by Trip Length
Travel insurance for Thailand
If you plan to rent a scooter, check that your travel insurance covers motorbike use — many policies require a valid motorcycle license, a 125cc limit, and a helmet. Compare policies before you fly.
Final Verdict
For most travelers landing at BKK or DMK, Airalo is the best overall data-only eSIM because it names True 5G and has clear fixed and unlimited prices. Saily is the budget-first option with live pricing, Yesim is the unlimited pick with a built-in VPN on plan pages, and Drimsim is the flexible pay-as-you-go choice for multi-country trips.
None of these four providers include a Thai (+66) phone number, voice, or SMS in Thailand. If you need a Thai number, use a local Thai carrier SIM/eSIM. For True via thailandesim.com, install only once you are in Thailand; outgoing calls and SMS require in-store passport KYC.
Prices in this guide were verified October 2026. Check live pricing before you buy, especially for Saily and Yesim.