For the fingerprint scanner to operate, hands must be clean and free of moisture, dirt, oil, lotion, dyes, etc.
Up to 5 fingerprints can be registered on the device.
From a Home screen, touch and swipe up to display all apps.
Navigate: Settings > Security & Location .
Tap Pixel Imprint.
From the 'Unlock with Pixel Imprint' screen, tap Next.
If presented, enter the current PIN, password, or pattern.
From the 'Choose screen lock' screen, select 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.
From the 'Touch the sensor' screen, place your finger on the sensor until it vibrates then lift.
From the 'Lift, then touch again' screen, continue pressing the sensor several times until it shows completed.