How Does eSIM Work? – Everything You Need to Know

eSIM is a digital version of the traditional SIM card. Instead of a physical card that you insert into your phone, the subscription information is stored directly in a built-in chip inside the device. This makes it easier to switch operators, and you never have to wait for a new SIM card to arrive in the post.

What is the difference from a regular SIM card?

A regular SIM card (nano-SIM) is a small plastic card you insert into a slot on your phone. An eSIM, on the other hand, is a programmable chip already built into your phone. You activate it by scanning a QR code or downloading a profile directly from your operator.

The big advantage is convenience — you can activate a new subscription in minutes instead of waiting for delivery. You can also have multiple subscriptions active at the same time, which is perfect if you want one for work and one for personal use.

Which phones support eSIM?

Most modern smartphones support eSIM:

Check your phone’s settings under “Mobile Network” or “SIM Card” to see whether eSIM is available as an option.

Which operators offer eSIM in Sweden?

In Sweden, operators including Vimla, Fello, Hallon, and Tele2 offer eSIM. The process differs slightly between operators, but it typically involves logging in to your account page and choosing to activate eSIM, after which you receive a QR code to scan with your phone.

How do I activate eSIM?

  1. Order eSIM from your operator (usually via their app or account portal)
  2. You receive a QR code — scan it with your phone’s camera
  3. Follow the on-screen instructions to add the subscription
  4. Done — you can start using your new subscription immediately

The entire process usually takes under 10 minutes.

Frequently asked questions

Can I keep my phone number when switching to eSIM? Yes. Switching from a physical SIM to eSIM does not affect your phone number. Your number stays the same.

What happens if I change phone? You will need to transfer or re-activate your eSIM profile on the new device. Most operators let you do this easily through the app or account portal.

Is eSIM more secure than a physical SIM? eSIM cannot be physically removed or swapped out, which makes certain types of SIM-swap fraud harder. In that sense, yes — it has a security advantage over a physical card.