iOS 18.1 Automatically Reboots Locked iPhones: A Hidden Security Feature

A hidden feature in iOS 18.1 automatically reboots a locked iPhone when it's asleep but hasn't been unlocked for 'a while,' likely as a security measure. Known as an “inactivity reboot,” this feature flushes the last state of the device, making it difficult to use forensic tools or brute-force methods. The timer is not reliant on charging or network functions and reboots after around four days.