How to choose a travel eSIM: the six things that actually differ

A $4.50 plan and a $19 plan are not comparable until you know they hold 1 GB and 10 GB. The per-gigabyte price is the only figure that compares two plans honestly, and it is the figure most shops make you calculate yourself. Do the division, or use a shop that prints it.

It cuts both ways. The cheapest plan for a destination is almost always the worst value per gigabyte, and the largest is almost always the best — which is only relevant if you will use it. See how much data you actually need first.

This is the one nobody mentions and the one that ruins trips. Many travel eSIMs route traffic out through a third country: you are standing in Thailand and every website sees you as being in Hong Kong or Singapore.

It does not affect speed. It affects two things that matter: banking apps that check where you appear to be and may block or challenge you, and streaming services, which will serve you the catalogue of the exit country rather than the one you are in or the one you are from.

A provider that states the exit country on the plan before you pay has decided you should know. A provider that does not is not necessarily hiding it, but you will find out after paying either way.

Personal hotspot is disabled on a significant number of travel eSIM plans, and it is rarely on the front of the box. If you plan to work from a laptop, or to share the connection with someone travelling with you, check it explicitly. A plan that forbids it is not a worse plan — it is just not the plan for you.

Two providers can both say "top-up" and mean opposite things. On one, you add data to the eSIM already in the phone and nothing else happens. On the other, you buy a new plan, receive a new QR code and install a second profile — which matters, because phones hold a limited number of eSIM profiles and because installing anything is the step most likely to go wrong.

Ask the question as: if I run out on day nine, do I need to install anything? The good answer is no.

"Europe" is a marketing word, not a list. Regional bundles routinely exclude the United Kingdom, Switzerland, Turkey or the Balkans, and a plan that stops working when you cross a border you did not think of is the worst version of this product.

Find the actual list of countries and check it against your route, including places you only change planes in. If the list is hard to find, that is information too.

The single-install rule is universal and it is the reason support matters more here than in most categories. An eSIM profile can be installed one time only; delete it and the plan is gone, whoever sold it. So the questions worth asking before buying are whether a human answers, how quickly, and what the refund policy says about a profile that was never installed.

A policy that refunds an uninstalled eSIM is a real commitment, because an uninstalled profile can be cancelled upstream. A policy that refunds an installed one, from anyone, should be read very carefully — the data is spent and cannot be returned.