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Is eUICC The Right SIM Solution For Your IoT Application?

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Before we try to answer the question posed in the title to this post, let’s step back and first try to understand the meanings of SIM, eUICC, and some of the other acronyms associated with mobile connectivity.


A subscriber identity module (SIM) is the chip card typically issued by a mobile operator that contains a mobile subscription. SIM cards are a universal integrated circuit card (UICC), which is the standard describing their physical and electrical characteristics. This subscription is technically called an international mobile subscriber identity (IMSI). The traditional SIM card issued by a mobile operator contains a single IMSI for the issuing operator. The IMSI is then used to authorize access to mobile networks, whether the home network or another network the device has roamed.


SIMs have come in a variety of physical formats; they started out back in the 1990s the size of credit cards, and gradually smaller and smaller form factors have been standardized as the devices became increasingly intricate. There is even an embedded SIM form factor, which is a tiny computer chip that can be soldered directly onto a circuit board.


All these types of SIMs are the same in terms of functionality. They provide a secure repository for the IMSI, ensuring authorized mobile networks can be accessed and keeping the IMSI safe to prevent it from being misused or replicated by a third party.


The eUICC (Embedded Universal Integrated Circuit Card) is different in that it provides a virtual filing system to store multiple virtual SIMs. These can also be remotely updated.


With the eUICC, to change the SIM, you only need to do a configuration change or over-the-air update, whereas with a UICC SIM, you must swap out the physical SIM card from the device.


Read the full article on Digitalist magazine.


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About the Author
John Candish leads the global business for SAP IoT Connect 365 for the SAP Digital Interconnect organization His goal is to make connecting IoT devices globally simpler for all enterprises. John has worked in both technical and commercial roles. Prior to his current position, John headed the global business for SAP IPX 365 mobile service for SAP Digital Interconnect.