Google rolling out auto-restart security feature to Android
With the latest Google Play services update, Android is rolling out a new security feature that automatically restarts (or auto-reboots) devices that have been “locked for 3 consecutive days.”
Restarting a device, returns it to a Before First Unlock (BFU) state where data is encrypted and harder to access as you’ve yet to enter your passcode, with biometric logins not yet enabled. On Pixel devices, the bottom of the lockscreen notes how you have to “Unlock for all features and data.” In comparison, data might be easier to access After First Unlock (AFU) when you are “signed in.”