Last updated May 2023
We have been using SIM cards for decades, and they have been getting smaller and smaller as technology has advanced.
Now, they are about to go through another radical change.
The latest generation of SIM cards, called the eSIM, is a reprogram
mable chip that is embedded inside a device (smartphone, tablet, wearable or connected object).
The information on an eSIM is rewritable and can be updated over the air.
Apple first turned to eSIM to add connectivity and since then, it is clear that more and more major players are joining the eSIM revolution.
The use of eSIM brings a number of advantages to device manufacturers and networks, but there is also some advantages for users, too.
The embedded SIM is very smart and lets users change mobile operator by just updating the software settings. Therefore, if your contract on one network is finishing, and you would like to swap to a new operator for a better deal, you will be able to have the new operator update your SIM over the air. No more swapping SIM cards.
eSIM cards are found in a wide range of consumer products, such as smartphones, wearables, and computers.
For industries, this is very useful too. The eSIM can be soldered in place inside a device and then sealed, making it water- and temperature-resistant.
This makes it more robust and thus ideal for use in a connected car, for example, which may well be driven in extreme heat and on bumpy roads.
eSIMs in short:
- The chip and its super secure software come embedded inside the phone.
- The SIM (Subscriber Identity Module) credentials necessary to sign on to your preferred carrier's cellphone network are downloaded.
- The eSIM works precisely as a SIM card.
If you would like to know more on eSims, read our post 6 key points to understand what an eSIM is.
Also carry on reading our Mobile Telephony Security guide