How we check eSIM information

Plan information

1. We pull the plan list from the provider system together with the time it was last synced.
2. We show that sync time on the plan page so you can see how old the price is.
3. If a sync fails we do not present a stale price as the current one.

Network information

Network names and supported technologies come from the eSIM provider and from the local operator's public documentation. We do not guarantee real-world speed: it depends on location, time of day, handset and operator policy.

Device support information

Device lists are compiled from manufacturer specifications and manufacturer announcements. Some regional variants — mainland China models, for example — ship without eSIM even when the model name matches, so we flag that in the tables and always tell you to check the handset itself.

Update cadence and corrections

Found something wrong? Email esimonline.asia@gmail.com. We fix it and log the change on our corrections page.

See our corrections log

What checking means on this page

The word tested is used so loosely in this industry that it barely means anything. Some sites apply it to reading a manufacturer's spec sheet; others to flying somewhere with a bag of handsets. This page exists to say exactly what we do. Most of our work is tracing information back to its origin, reading all of it, and comparing sources to see whether they agree — not standing in each country measuring throughput on a shelf of test devices.

That does not make the information here weaker than a site announcing its own tests. Reading source documentation carefully catches more errors than people expect, particularly around handset variants and plan conditions. But it has limits, and those limits are what this page sets out.

The three streams behind a single page

A destination page is built from three streams of information with different reliability and different verification routes. Separating them is the first thing we do when writing a new page.

What we genuinely can verify

The checks we can run ourselves, and do run routinely, are the ones that do not depend on being somewhere: the install flow on handsets we have, whether cited links and documents resolve, whether the conditions written in an article match the ones the provider states, and whether the Thai and English on a page agree with each other.

We can also check whether a plan carries the conditions people routinely miss: data-only with no voice number, validity counted from activation or from purchase, and whether tethering is permitted. That information exists in the provider's documentation, but buyers usually do not see it until something trips them up mid-trip.

What we cannot verify ourselves

What we cannot verify on your behalf is the experience at the spot where you are standing. A speed measured in one city says nothing about another, or even about a different floor of the same building. Signal depends on the nearest mast, how many people are on it, the bands your handset supports, and the agreement between the eSIM provider and the local operator, whose terms we do not see.

Another thing outside our reach is traffic prioritisation. A roaming or wholesale customer can be prioritised below the host operator's own subscribers at busy times. Those are commercial arrangements that are not published, so we cannot confirm or deny them country by country.

Plan data and the sync clock

Prices and plan details here are pulled from the provider's system rather than typed in by a person. The upside is that they track changes; the downside is that they are only as fresh as the last sync. We show that sync time so you can judge for yourself whether what you are reading is current enough to act on.

Device tables: what one row is built from

A single row in an eSIM compatibility table looks trivial, and it is the easiest thing on the whole site to get wrong, because the same model name can mean different hardware depending on where it was sold. These are the steps behind one row.

1. 1Start from the manufacturer's own spec pageNot from another site's table. One site's error gets copied across the whole industry, and once it has gone round the loop it looks like a fact everyone agrees on.
2. 2Identify the variant and model numberThe same model sold in different markets can carry a different model number and different hardware. The well-known case is mainland China variants of some handsets shipping without eSIM despite an identical model name.
3. 3Separate hardware support from being able to use itA handset may carry the eSIM hardware yet be locked by the carrier that sold it, so another provider's profile will not install. That depends on who sold the device and where, not on the model.
4. 4Check whether it can run alongside the main SIMSome models support eSIM but cannot run it at the same time as a physical SIM, which changes the advice entirely for anyone who needs to keep a Thai number live for OTP messages.
5. 5Write the caveat, not just a tickIf a model has conditions, the table shows them. A bare tick with no note is the answer that makes people buy the wrong thing.
6. 6Point the reader back at their own handsetWhatever the table says, the definitive answer is on the handset in your hand, so we put a link to the device checker beside the table every time.

Install steps and menu names that move

Install flows are something we can check ourselves, but only on the handsets and versions we have. The menu used to add an eSIM is named differently by different manufacturers and can move on a system update, so our guides describe what to look for and roughly where it lives in Settings rather than asserting one fixed path for every device.

If you cannot find the menu, the fastest route is the search box inside Settings: type eSIM, or the SIM-related word in whatever language the phone is set to. If the search returns nothing at all, that usually means the model does not support it, or you have a variant with the feature removed.

The parts that depend on each country's law

Some countries require telecoms users to be registered, some restrict particular services, and the conditions can differ by nationality and visa type. We do not write legal conclusions on behalf of another country's authorities. What we can do is flag that the issue exists and point you to the official source, or to the provider, before you travel.

Readers are part of the verification

A report from a reader who followed a guide and got stuck is worth more than lab conditions on our side, because it covers handsets and OS versions we could never own in full. When you write in, this is the information that gets it fixed fastest.

• The model and model number, plus the country the handset was bought in if you know it.
• The OS version running at the time.
• The plan name and the destination country.
• The steps you completed, and the one where it stopped.
• The exact on-screen message — a screenshot is better still.
• Whether a main SIM is also in use, and whether data roaming is switched on.

What each kind of source can and cannot tell you

What we will not write, however well it would sell

We do not write works on every phone, we do not write fastest in the country, and we do not publish coverage percentages with no origin. Those lines sell in the short run, and what they produce is a buyer standing abroad with a plan that will not work, which costs more than the sale was worth.

Check whether your handset supports eSIM

Read the step-by-step install guide