But what is an eSIM for? (And is it worth switching?)
New phones offer it, carriers push it, but nobody explains what changes. The eSIM in plain words: what it is, when it's worth it, and the one case where the plastic SIM is better.
- Level
- beginner
- Time
- 5 minutes
- What you need
- Nothing, just curiosity
When you buy a new phone, the carrier asks: “physical SIM or eSIM?”. Most people answer at random. Let’s clear it up.
SIM: the little plastic card that tells the network "this phone belongs to Andrea, with this number". eSIM (electronic SIM): exactly the same thing, but written into a chip already inside the phone, no card. You "download" it with a QR code instead of sliding it into a tray.
What changes in practice
Nothing, in daily use: you call, text and browse exactly as before. What changes is the moment you need to activate, change or add a line: with an eSIM you do it in five minutes from the sofa, scanning a QR code the carrier emails you, with no waiting for delivery or trips to the shop.
When it’s a blessing
- You travel abroad. You buy an eSIM for the country you're visiting online (10 to 20 euros for one or two weeks of data), activate it before leaving, and the moment you land you're connected, while keeping your home number active for calls. It's the number one reason it's worth it.
- You want two numbers on one phone. One personal, one for work, without carrying two phones. Almost all recent phones handle a physical SIM plus an eSIM, or two eSIMs.
- Your phone gets stolen. An eSIM can't be pulled out and put in another phone: the thief can't use your number to receive your bank's codes.
The one case where it’s worse
If you change phones often or keep a spare, with a physical SIM you just move the card; with an eSIM you have to transfer it (easy on iPhone and recent Samsungs, clunkier on other Androids, and some carriers charge a few euros). And if the phone breaks completely, you can’t move the number to an old phone until you get the eSIM reissued.
There's no difference in reception, speed or battery use. And you can always go back to a plastic SIM by asking your carrier.
If your phone supports it, the eSIM is worth it: convenient, safer against theft and unbeatable when travelling. Keep the physical SIM only if you swap phones every month or want to move your number to an old model without any fuss.