About eSIMonline

eSIMonline sells travel eSIMs and publishes a library of guides about staying online abroad. The goal is simple: someone who has never used an eSIM should be able to read one page and buy the right plan the first time.

What we sell, and how

Every plan on this site is sold directly by us. We issue the eSIM profile through the provider we integrate with. You pay us and receive the QR code from us.

How we make money

• Margin on the plans we sell directly.
• Reseller and corporate programmes for agencies, tour operators and companies buying in volume.

Revenue is not a ranking factor. We do not label a plan Best because it pays us more, and every comparison explains which situation a plan suits and why.

Contact us

• LINE @esimonline: https://lin.ee/skDPoNx
• WhatsApp: https://wa.me/message/YTADWGTLZL2VH1
• Call 089-942-0818 or 088-521-6848
• Email esimonline.asia@gmail.com

我們每天 24 小時透過電話、LINE 和電子郵件回覆，無論你在哪個時區。泰國時間深夜回覆可能會稍慢一些，但絕不會拖到隔天早上。

Read our editorial policy

The problem this site was built around

Most travellers leaving Thailand deal with connectivity last — the night before the flight, or while waiting at the gate — and then have to choose from a screen full of gigabyte numbers, near-identical plan names and vocabulary nobody explains. The outcomes are fairly predictable: a plan far bigger than the trip needs, a plan the handset cannot use, or nothing at all followed by expensive roaming.

eSIMonline exists so that decision takes a few minutes and does not require guessing. The site has two halves that work together: a shop, and a library of guides and tools that answer the basic questions before you pay — whether your handset supports eSIM, roughly how much data a trip like yours uses, and what to do if it installs but does not connect.

Who this site is written for

Our main reader is someone flying out of Thailand who does not work in tech. Every guide starts from the assumption that they have never installed an eSIM and should not need to understand how an eSIM profile works in order to use one. The groups we think about most are families travelling with older relatives, students on a first trip, and people who still need calls and OTP messages on their Thai number while abroad.

There is a group we know we are not writing for: readers who want deep technical comparisons of every operator in every market. Our content does not go that deep, and saying so plainly seems better than letting someone spend an afternoon finding out.

Every plan on this site is sold by us

Every plan page on this site is sold by us, through suppliers we connect to directly. No other seller sits between you and us. You pay through our checkout, we are the ones who send the QR code or install details once payment succeeds, and the only refund terms that apply are ours, as set out on our refund policy page.

From choosing a plan to being online

This is the path for buying a plan here. The order matters in one place: check the handset before paying, not after.

1. 1Check the handset firstConfirm the phone supports eSIM and is not carrier-locked. Start with our device checker, then confirm in the phone's own settings, because regional variants mean every table has exceptions.
2. 2Estimate the data this trip needsMost people overestimate, because they think of home usage where Wi-Fi is always there. Our data calculator gives a rough figure from the behaviour you select — an estimate, not a guarantee.
3. 3Pick a country or a regional planFor a single country, a country plan is usually better value. For a trip crossing several, a regional plan saves swapping profiles en route — read its country list in full before deciding.
4. 4Pay and receive the install codeOnce payment succeeds you receive a QR code or the install details. Save them somewhere you can open without a connection — a screenshot in your photos, for instance — because some people install while offline.
5. 5Install while still in ThailandInstall the profile while you still have Wi-Fi, and switch it on when you land. Installing and activating are separate steps, and most plans start counting validity at activation rather than installation — but confirm on that plan's own terms, since the rule varies by provider.
6. 6Activate on arrivalOn arrival, switch data to the eSIM profile and enable data roaming for it as the guide describes. If nothing connects within a few minutes, try selecting the network manually before writing to us.

Six things to check before you pay

• The handset supports eSIM and is not carrier-locked.
• The plan covers every country on the itinerary, not just the first one.
• The validity covers the whole trip, and you know when the clock starts.
• You know whether it is data-only or includes a number.
• If you need to tether, the plan allows it.
• You have checked that the email for receiving the QR or install details is typed correctly.

The money, and what it does to what you read

We earn from margin on the plans we sell ourselves, and from business orders. There is no other source of revenue. A disclosure is not much use without saying what it changes, so: revenue is not a ranking factor, and any recommendation has to justify itself without reference to margin.

What we do not have is worth stating just as clearly: no advertising, no sponsored space, no affiliate or creator programme to join, no commission from anywhere, no other seller selling plans on our behalf, we do not pay anyone to write about us, and we do not sell space for someone else to publish under our name. If anyone approaches you claiming to be eSIMonline on any of those grounds, it is not us, and we would like to know.

What we are not

Most misunderstandings come from assuming we are something we are not, so here it is plainly.

• We are not a network operator. We own no masts anywhere, so signal quality belongs to whichever local network the plan runs on.
• We are not a payment processor. Payments run through connected payment providers, and some conditions — how long a refund takes to land, for example — follow that provider's system and your bank.
• We are not a travel agency or visa adviser. Entry paperwork has to be checked with that country's authorities.
• We are not a repair centre. If the fault is in the handset or its operating system we can help diagnose it, but we cannot fix the device.

Support: what it can and cannot do

Support runs on LINE, Messenger, email and two telephone lines, and we take messages 24 hours a day, every day. What we do not promise is the same speed at every hour: the small hours in Thailand can be slower than the middle of the day. There is no window in which we stop taking them.

Refunds, and the parts that depend on others

The refund terms for plans we sell are set out on our refund policy page. The thing to understand is that an eSIM is a digital product which, once activated, often cannot be reversed, because the profile has already been issued from the upstream provider's system. What we can do therefore differs a great deal between an unactivated plan and an activated one.

What is not in our hands is how long the money takes to appear, which depends on the payment provider and your card issuer, and consumer-law rights, which differ by the country you are in. If you are unsure which case applies to you, send us the order number and we will check it against the policy as written, rather than against whatever sounds kindest.

The tools we built, free to use

The tools here are not lead-capture forms and are not reserved for buyers. They are open, because the questions they answer are the ones that should be answered before you pay rather than after.

• The device checker: whether your model supports eSIM, with the caveats about regional variants and locked handsets.
• The data calculator: a rough estimate of what a trip will use, based on the behaviour you select.
• The regional plan pages, for itineraries crossing several countries in one go.
• Step-by-step install guides, including what to do when it installs but will not connect.

Browse all eSIM plans

Estimate the data your trip needs

Language, and how we write

The site is written in two languages and both carry equal weight. The Thai is not translated word for word from the English; it is written as Thai from the start, because literal translations of technical material tend to be unreadable. What must match across the two is the facts and the conditions, not the sentence shapes.

We avoid jargon where it is not needed, and where it is, we explain it in the same line or link to a glossary entry. The aim is a reader who finishes the page able to decide, not one who finishes it and has to ask us anyway.

Companies, teams and group travel

Alongside individual purchases we take consolidated orders from companies, agencies and tour operators looking after several travellers at once. What differs from a single purchase is the paperwork and the handover: the party paying is usually not the person holding the phone, so it needs a traveller list and a guide that can be forwarded to staff.

Contacting us, and when we really answer

There are three ways to reach us: LINE @esimonline at https://lin.ee/skDPoNx, email at esimonline.asia@gmail.com, and the phone numbers we publish ourselves, 089-942-0818 / 088-521-6848. If you see a different phone number claiming to be eSIMonline anywhere, it is not ours.

Messages from people already travelling are prioritised, because someone standing abroad without a connection cannot wait like someone who has not left yet. If that is you, say in your first message which country you are in and what is happening.

Message the team