A fingerprint is utilized to unlock the device. For the fingerprint scanner to operate, hands must be clean and free of moisture, dirt, oil, lotion, dyes, etc.
Up to 4 fingerprints can be registered on the device.
From a Home screen, navigate: Apps > Settings > Lock screen and security (Personal section).
These instructions apply to Standard mode only.
If presented, enter the current PIN, password, or pattern.
From the Manage fingerprints section, tap Add fingerprint.
Locate the Home button below the display and place your finger on the sensor until it vibrates then lift.
Repeat this step as necessary until the process is complete.
For greater accuracy, finger placement should vary slightly each time.