- Jul 30, 2010
Before I go to sleep I put my phone on wireless charger. I wake up in the morning and it show unlock using passcode. No fingerprint or face unlock. On top of that the phone does not look like it rebooted.
For me, it only asks for my password around once a week (I haven't done anything to modify the feature). It may depend on which biometric authentication you've enabled. I only use fingerprints.
You can rule out that explanation by looking in Settings | About Phone | Status | Up Time to see when the phone last rebooted.