The mobile phone industry has undergone dramatic changes in the past decade, with devices evolving from flip phones to powerful computers. However, one component that has remained constant is the SIM card. The SIM card allows users to easily transfer their cellular service from one phone to another, regardless of the device’s age or manufacturer. While SIM cards were initially designed to carry the subscriber’s entire digital life, their role has shifted to primarily holding data necessary for network authentication. As technology continues to advance, embedded-SIMs and integrated-SIMs are becoming more prominent, potentially eliminating the need for physical SIM cards altogether.
https://hackaday.com/2023/03/20/the-rise-and-eventual-fall-of-the-sim-card/