system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are sim cards still used? Couldn't they just be done in software with modern smartphones?
gpt
The entire point of SIM cards is to have a hardware component that is replaceable and tied to an account. This is not a flaw in the design, it's a key feature.. It allows account switching on devices without tying up valuable phone company employee time. The account is tied to the SIM, not the phone.