Things were simpler back then - nokia phones saved the sim pin into memory and had watch dog timers that would just reboot the phone if it locked up and use the

Things were simpler back then - nokia phones saved the sim pin into memory and had watch dog timers that would just reboot the phone if it locked up and use the in memory pin to unlock the sim. If you didnt happen to be watching the display at the time you would never know it rebooted.