Why? To be able to unlock with gloves, without gloves, by swiping, by fingerprint, etc.
Steps:
1. Add an unlocking method, eg. PIN, PATTERN, PASSWORD
2.Assign your fingerprints
3. Reboot to twrp, go to advanced, file manager and then navigate to 'data/system'
4. From there delete the following files:
locks strings.db-wal
locksettings.db-shm
locksettings.db
gatekeeper.pattern.key
gatekeeper.password.key
5. Reboot
Now you should be able to unlock your phone without any pin, pattern or password, but still be able to use fingerprint.
I know it might sound useless to some, but...
Steps:
1. Add an unlocking method, eg. PIN, PATTERN, PASSWORD
2.Assign your fingerprints
3. Reboot to twrp, go to advanced, file manager and then navigate to 'data/system'
4. From there delete the following files:
locks strings.db-wal
locksettings.db-shm
locksettings.db
gatekeeper.pattern.key
gatekeeper.password.key
5. Reboot
Now you should be able to unlock your phone without any pin, pattern or password, but still be able to use fingerprint.
I know it might sound useless to some, but...