"There is an apparently new iOS 18 security feature that reboots iPhones that haven’t been unlocked in a few days, frustrating police by making it harder to break into suspects’ iPhones
…
Apple added “inactivity reboot” code in iOS 18.1 that triggers iPhones to restart after they’ve been locked for four days"
What SIM card?
Yea, eSIM is starting to take over the contemporary phone market.
The last 3 generations of iPhone released in the US do not have physical SIM card slots at all.