CMF Phone 2 Pro on Android 16 stuck in a biometric authentication loop.
I had:
- Face unlock enabled for lockscreen
- Fingerprint enabled only for apps (NOT for lockscreen unlock)
Now whenever I try to:
- enable fingerprint for lockscreen
- change biometric settings
- use Google Password Manager/autofill in some cases
the phone asks for biometric verification AFTER already accepting my PIN/password.
Problem is: the fingerprint is not authorized for lockscreen/device unlock, so it fails for system-level authentication even though fingerprint still works inside apps/app lock.
So I’m stuck in a circular state where Android wants fingerprint auth to change fingerprint settings.
Things that still work:
- PIN/password
- face unlock
- fingerprint inside apps
Things that don’t:
- changing biometric settings
- enabling fingerprint for lockscreen
- some credential manager/auth flows
Things already tried:
- multiple reboots
- unlocking with PIN only after reboot
- biometric lockout attempts
- recovery mode
- clearing Google Play Services data
- clearing Credential Manager cache
- checking Autofill/Password Manager settings
No change.
Has anyone seen this on Nothing OS / Android 16 or knows a workaround without factory reset?