A Subscriber Identity Module, also known as a SIM card, is a ubiquitous piece of technology that we probably know thanks to our smartphones. The idea behind it is that this removable chip stores and manages information related to cellular networks and user identity. This identity is usually tied to the IMSI (International Mobile Subscriber Identity) number that is contained within the SIM card. Furthermore, some additional security features inside the SIM itself are relevant to both the carrier and the end user.
An eSIM (embedded SIM) on the other hand is an industry-standard digital SIM that allows you to have all of the benefits of a SIM card without the need to have a physical SIM present. There are numerous benefits to using eSIM as opposed to a SIM card, convenience being the biggest one. On some phones, you can have multiple eSIMs active, easily (digitally) swap your eSIMs on the go, and have multiple carriers for various use cases. In addition, all of the same identification and security features that are present in the SIM are also available with eSIMs.
