Cell Phone SIM Cards Do a Lot

[SactoDoug]

My old assumption was that SIM cards were just a way that cell carriers identified phones. This video was really eye opening for me. A SIM card is a full blown computer that talks independently to the cell carrier without the OS (Android/iOS ect.) even knowing. It is also a separate attack vector, especially for government level actors.

https://www.youtube.com/watch?v=0Em-J_3QYu4

[dk94044]

new phones are all e-SIM no card

[SactoDoug]

new phones are all e-SIM no card

How does that change anything as far as the SIM card or eSIM card working independently of the application processor?

[Marauder2003]

Not true. My Samsung S22+ has both.

new phones are all e-SIM no card