What Is an eSIM and How Does It Work (Explained Simply)
eSIM stands for 'embedded SIM', a SIM chip that's already built into the phone instead of a plastic card you insert into a tray. Instead of physically inserting a card, the network profile is installed digitally by scanning a QR code.
This technology has existed for a few years now in most newer phones, and its biggest benefit shows up exactly when travelling abroad.
Physical difference from a classic SIM card
A classic SIM card is a small plastic chip you physically insert into a phone's tray and remove when switching operators. An eSIM is a chip soldered inside the phone that can't be removed, but it can hold several different network profiles at once.
How the profile gets installed
Instead of going to a shop for a physical card, the network operator sends you a QR code. By scanning that code through the phone's settings, the network profile is downloaded and installed directly onto the eSIM chip inside the phone, entirely digitally.
The whole process takes a couple of minutes and requires no physical contact with a shop or courier.
How many profiles a phone can store
Most modern phones can store several eSIM profiles at once, but usually only actively use one or two at the same time (one for calls, one for data, for example). The other profiles stay saved and can be turned on later without scanning the QR code again.
Why eSIM is practical for travel
For travellers the biggest advantage is not having to swap a physical card or look for a shop at the airport. You buy a plan online before your trip or right after landing, get a QR code by email, and have local internet within minutes, no queuing required.
- No need for a physical shop visit
- You keep your home number on the physical SIM for calls
- Purchase and activation are entirely online
- Multiple profiles can be saved for future trips
Which phones support eSIM
Most phones made in the last few years, including newer iPhone, Samsung Galaxy and Google Pixel models, support eSIM. Checking is simple — dial *#06# and look for an EID number next to the IMEI.
Frequently asked questions
Does eSIM completely replace a physical SIM card?
Not necessarily, many users use an eSIM for data while keeping a physical SIM for calls on their home number.
Does eSIM work on older phones?
No, it requires manufacturer support for that technology, mostly found on models from the last few years.
Can I have multiple eSIM profiles at once?
Yes, a phone can store several profiles, but usually actively uses one or two at a time.
Is eSIM safer than a physical card?
An eSIM can't be physically removed or lost, which reduces the risk of identity theft through SIM swapping.