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What is eUICC and how does it work?

eUICC is often mistakenly associated with eSIMs.

eUICC (Embedded Universal Integrated Circuit Card) is the software component of a MIS. As such, it is not a physical object.

eUICC is a functionality that allows you to store multiple Mobile Network Operator (MNO) profiles and to remotely switch between them using Over-The-Air (OTA) technology.

In other words, thanks to the eUICC functionality, you can have multiple numbers with only one SIM and can easily switch between them by changing the settings.

A SIM card with UICC functionality can only install and use number.

However, whilst the eUICC is designed to support multiple MNO profiles on the same device, they can only be used one at a time.

You should also bear in mind that not all eSIMs have eUICC and some classic SIM cards may now have this functionality.