For the fingerprint scanner to operate, hands must be clean and free of moisture, dirt, oil, lotion, dyes, etc.
Up to five fingerprints can be registered on the device.
From a Home screen, tap the Arrow upicon to display all apps.
Navigate: Settings > Security & Location .
From the 'Unlock with fingerprint' screen, tap NEXT.
If presented, enter the current PIN, password, or pattern.
On the 'Unlock selection' screen, choose an option to use as a backup screen lock (e.g., Pixel Imprint + Pattern, etc.) then follow the instructions to set up the backup screen lock.
Refer to Set Up Screen Lock for assistance.
On the 'Find the sensor' screen, tap NEXT.
On the 'Let's start' screen, place your finger on the sensor until it vibrates then lift.
Continue pressing the sensor several times until it shows completed.
Tap 'Done' or 'Add another' to add another fingerprint.