eSIM, pocket WiFi, or a SIM from the airport?

Three real options, and the honest way to choose between them is to count. One person with one phone should take a travel eSIM. A group sharing one connection across several devices has a genuine case for pocket WiFi. Someone who needs a local number, or whose phone cannot take an eSIM, is buying a SIM when they arrive. Everything else is detail.

They are not really competing products, which is why comparisons that declare a single winner tend to be useless. They solve slightly different problems and the trip decides which problem you have.

Pocket WiFi: one connection, several devices

A pocket WiFi device is a small router with its own data plan. It creates a network that anything nearby can join, which is the thing it does that the other two options do not do as naturally.

That makes it worth considering when there are several of you, or several devices, and you would rather buy one connection than four. A family, a work trip with a laptop and a tablet in play, a group who will mostly be in the same place at the same time.

The costs are structural rather than hidden. It is another object: it has to be charged every day, carried by someone, and in most cases collected and returned, which puts a shape on the start and end of your trip. And it only works for the people standing near whoever has it, so the moment the group splits up for the afternoon, the connection goes with one of you.

The airport SIM: buying a local line on arrival

The classic version, and it still does something the others cannot: it gives you a local number.

If your trip needs one, for a domestic service that will only text a local line, this is how you get it. It also works on phones that cannot take an eSIM at all, which is a small but decisive group.

What you are trading is timing and choice. You are buying after a flight, from whatever is in front of you, at the point in the trip where you have the least energy for comparing anything. The swap also means your own SIM comes out and has to be kept somewhere safe for the duration, and your usual number is out of action while the local one is in the phone. For a long stay in one country, those trade-offs can be well worth it. For a week, they are a lot of admin for the benefit.

The travel eSIM: sorted before you leave

A travel eSIM is a data plan installed onto the phone you already carry, alongside the SIM already in it. Nothing to collect, nothing to return, nothing to charge separately, and no queue at the other end.

The two things it is genuinely best at are being finished before you travel and leaving your own number alone. Your existing line stays live for calls and texts while the travel line does the data, so the parts of your life that arrive by text keep arriving. What is an eSIM? covers how the two lines sit together.

Its limits are the honest mirror of the above. It is data only, so it is no help if you specifically need a local number. It needs a phone that supports eSIM, which Is my device compatible with Halo eSIM? will confirm in a few seconds. And sharing it with other people means running your phone as a hotspot, which works but puts the job on one person’s battery. Can I share my data with other devices? covers how that behaves in practice.

So which one for which trip?

Count the people and the devices, then check two facts.

One person, one phone, a holiday or a work trip: travel eSIM. It is the least admin by a distance and there is nothing about that trip the other two do better.

A group or a family who will largely move around together, with several devices to keep online: pocket WiFi is a fair call, as long as someone is happy to own the device and its charger.

A long stay, or a genuine need for a local number, or a phone that cannot take an eSIM: buy a SIM when you arrive, and accept the admin as the price of the thing you actually need.

The two facts to check before committing to any of it are whether your phone supports eSIM, and whether your destination needs you to have a local number for anything you have planned. Those two answers eliminate at least one option almost every time.

In three lines

• One person with one phone: travel eSIM, and it is not close.
• A group sharing one connection across devices: pocket WiFi earns its place.
• A local number, a very long stay, or a phone without eSIM support: buy a SIM on arrival.

If it is the first of those, plans for your destination are on the destinations page, and Choosing the right plan for your trip covers sizing one once you are there.