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Thailand
Thailand
Home / Local eSIMs / Thailand eSIM

Thailand eSIM

Thailand eSIM

Plan Highlights
Premium Networks
AIS / True
Registration
No ID Required
Top Speed
5G / 4G LTE
Plan Options
Data / Data + Thai Number
Tech Specs
Networks
AIS & True
Daily and total-data plans run on both networks. The Unlimited tiers run on True.
Calls & SMS
Data Only (Standard)
For Unlimited Max:
Includes a free Thai number for incoming calls and SMS, plus free True Wi-Fi. Outgoing calls and SMS need re-registration at a True store.
Coverage
Nationwide
Bangkok, Chiang Mai, Chiang Rai, Phuket, Krabi and the islands in between.
Devices
All unlocked eSIM devices
Check supported phones list →
Activation
Automatic
Auto-start on arrival; turn on data roaming for ByteSIM.
Hotspot
Supported
Support
24/7 Live Support
Response in under 5 mins via WhatsApp & Email.
Speed Policy
Unlimited Max
Truly unlimited 5G max speed with no daily cap and no throttling.
Unlimited Plus & Lite
Choose 1GB/day at full speed then 10Mbps, or steady 10Mbps - both fast enough for maps, chat & HD video.
Daily & Total Plans
5G high-speed within quota, then unlimited 128kbps.
Best
Seller
Unlimited Max, 10 Days
5G max speed, no throttling - with a Thai number for incoming calls and SMS.
Two networks, two strengths
Thailand's two leading networks are strong at different things.
AIS Coverage
8.9 / 10 coverage
The widest reach of Thailand's three networks - what matters once you leave Bangkok for the islands or the north.
True Best Network
90.2% of the time on 5G
The highest 5G Availability in Thailand, on the network that holds the Best Network title.
Source: Opensignal® Thailand, August 2026.
$2.90 USD
$0.00 USD
Data
500MB/Day
1GB/Day
2GB/Day
3GB/Day
Total 3GB
Total 5GB
Total 10GB
Total 20GB
Total 30GB
Total 50GB
Unlimited Max - No Throttle + Thai Number
Unlimited Plus - 1GB/day Full Speed, then 10Mbps
Unlimited Lite - 10Mbps Throughout
Service Days
1
3
5
7
10
15
20
30
8
Quantity
Only 2408 left

Plan guide

Which Thailand eSIM plan is right for you?

Choose the data and speed you need for your trip, with a Thai number if you want one.

  • Everyday unlimited

    Maps, rides & messages

    For getting around and keeping in touch each day.

    Unlimited Plus

    1GB of full-speed data each day, then unlimited data at 10Mbps.

    Unlimited Lite

    Thai IP

    Unlimited data at a steady 10Mbps for your whole trip. Nothing to track.

    10Mbps handles maps, messaging, social feeds, music and 1080p video. Large downloads take longer.

  • More data. More possibilities.

    Full speed, all trip

    For streaming, large downloads and a local number people can reach you on.

    Unlimited Max

    Unlimited data at the maximum available speed.

    No daily cap. No throttling.

    • Thai number included
    • Thai IP

    Includes incoming calls and SMS. Outgoing calls and SMS require re-registration at a True store.

  • Fixed data amount

    Flexible data options

    Pick a data allowance, which often costs less on a short trip.

    Daily Data
    A fresh high-speed allowance every day.
    Total Data
    One high-speed allowance for your whole trip.
    • AIS + True coverage
    • Data only

    After your allowance, data continues at 128kbps for light messaging. Maps and video may be very slow.

Hotspot supported on all plans

Thai number included with Unlimited Max only

A local connection

Do you need a Thai phone number?

A data-only plan works for maps and app-based calls. A Thai number helps when local contacts need to call or text you directly.

When a local number helps

  • Hotels & tour pickups

    Give your hotel or tour operator a local number for arrival updates and pickup calls.

  • Drivers & deliveries

    Stay reachable when a driver or courier needs to call you directly.

  • Reservations & callbacks

    Leave a local contact number for booking confirmations or changes.

Included with Unlimited Max

Your Thai number

+66
Incoming calls & SMS
Included with your plan.
Outgoing calls & SMS
Register in person at a True store with your passport.
App registration & verification codes
Service-dependent; not guaranteed.

Network & coverage

Where will your Thailand eSIM work?

Stay connected in Bangkok, Chiang Mai, Phuket and other popular destinations. Your local network depends on the plan you choose.

From city to coast

Selected destinations in Thailand A geographic map showing Chiang Rai, Chiang Mai, Bangkok, Phuket and Krabi. Destination markers are for orientation, not measured signal coverage.
Selected destinations · map for orientation

Along your itinerary

  • Northern Thailand

    Chiang Mai & Chiang Rai

  • City stays

    Bangkok

  • Beaches & resort stays

    Phuket & Krabi

Your plan, your network
Your planLocal network
Unlimited plansLite · Plus · MaxTrue
Daily & Total DataAIS + True
How it works

How to set up your Thailand eSIM

Install before you fly. Your plan starts when you connect to a supported network in Thailand.

  1. Choose

    Check your device & choose a plan

    Check your phone is eSIM-compatible and unlocked, then choose your data and travel days.

    Check compatible devices
  2. Install

    Install before you travel

    On Wi-Fi, install your eSIM using the QR code in your email or the ByteSIM App.

  3. Connect

    Connect on arrival

    In Thailand, turn on your eSIM, select ByteSIM for mobile data and enable data roaming on that line.

  4. Manage

    Manage in the app

    View your plans, check usage and contact ByteSIM support in the app.

Why ByteSIM

Book your Thailand eSIM with confidence

Real people to help, clear refund terms and industry recognition.

Human support

Real people, available 24/7

Get help with installation, activation and connection issues, before or during your Thailand trip.

WhatsApp Email
Plans can change

180-day money-back guarantee

An unused eSIM may qualify for a full refund when requested within 180 days of purchase. Conditions apply.

View refund policy
Industry recognition

MIA 2026 Finalist

Shortlisted for Best eSIM Provider at the Mobile Industry Awards.

View 2026 finalists
Traveler Reviews

Amazing service, trusted by travelers

Real experiences with ByteSIM setup, connectivity and 24/7 support.

Read ByteSIM reviews on Trustpilot
Good to know

Thailand eSIM FAQs, answered clearly

Answers about plan speeds, Thai numbers, setup, hotspot and refunds.

How do Unlimited Lite, Plus and Max differ?
  • Unlimited Lite: unlimited data at 10Mbps throughout your trip.
  • Unlimited Plus: 1GB of full-speed data each day, then unlimited data at 10Mbps.
  • Unlimited Max: full-speed unlimited data with no daily cap or throttling, plus a Thai number for incoming calls and SMS.
What happens when Daily or Total Data runs out?

Daily plans provide a high-speed allowance each day. Total Data plans provide one allowance for your whole plan period. After the applicable allowance is used, data continues at 128kbps.

This backup speed is mainly for light messaging. Maps, browsing and video may be very slow.

Which networks does the Thailand eSIM use?

Unlimited Lite, Plus and Max use True. Daily and Total Data plans use AIS and True.

Coverage includes popular destinations such as Bangkok, Chiang Mai, Chiang Rai, Phuket and Krabi. Signal quality varies by location, especially on boats, remote islands and in mountainous areas.

Does my Thailand eSIM include a Thai phone number?

Unlimited Max includes a Thai number for incoming calls and SMS. Unlimited Lite, Unlimited Plus, Daily and Total Data plans are data-only and do not include a Thai phone number.

Do I need a passport to use the eSIM or make calls?

You do not need to submit ID to use mobile data. Unlimited Max includes incoming calls and SMS.

To enable outgoing calls and SMS on Unlimited Max, register in person at a True store in Thailand with your passport.

Can I receive verification codes for apps or banks?

Unlimited Max supports incoming SMS, but verification codes and account registration depend on the app or service and are not guaranteed. A Thai phone number does not guarantee acceptance by every service.

When does my plan start, and can I install it early?

Install your eSIM before departure using Wi-Fi, either with the QR code in your email or through the ByteSIM App. Your Thailand plan starts when the eSIM connects to a supported network in Thailand.

On arrival, turn on the eSIM, select ByteSIM for mobile data and enable data roaming on that line.

How is one day of validity calculated?

Daily and Total Data: one day is a calendar day in UTC+8, rather than a rolling 24-hour period. The calendar day changes at midnight UTC+8 (11pm in Thailand).

Unlimited Lite, Plus and Max: one day is a 24-hour period, counted from activation.

How do I check my Unlimited Max data, number or balance?

Select your Unlimited Max eSIM as the calling line, then dial:

  • Check data usage: *900#
  • Check phone number: *833#
  • Check balance: *123#

These codes apply to Unlimited Max.

Can I share data through a hotspot?

Yes. Hotspot and tethering are supported on all Thailand plans, so you can share mobile data with a laptop, tablet or another phone. Choose your plan with the data needs of those devices in mind.

Will this eSIM work on my phone?

Your phone must support eSIM and be carrier-unlocked. Check your exact model and regional version on the compatible device list before buying.

Can I keep my existing WhatsApp or LINE account?

Yes. You can continue using your existing WhatsApp or LINE account over ByteSIM mobile data. You do not need a Thai number just to use those apps.

Keep access to your original number in case an app asks you to verify it again.

What should I do if the eSIM does not connect?

Check that your ByteSIM eSIM is turned on, selected for mobile data and has data roaming enabled. Restart your phone and try selecting a network supported by your plan.

If you still cannot connect, contact ByteSIM support on WhatsApp with your order number and screenshots of your mobile data settings.

Can I get a refund if my plans change?

An unused eSIM may qualify for a full refund if requested within 180 days of purchase. Eligibility depends on installation, activation, usage and the reason for the request.

For connection problems, contact support while the plan is valid so the issue can be investigated. See the refund policy for the full terms.

Helpful links

Before you choose your Thailand eSIM

Check your phone, review the refund policy and know where to get help.

Next step

Choose your Thailand eSIM

Choose the data and travel days that fit your trip. Need a Thai number? Select Unlimited Max.

Back to plan options Need help choosing? ByteSIM Support is available 24/7.