You can set up your device to unlock by using your fingerprint. When this lock type is set up you can place your the finger you used to set up the lock on the fingerprint sensor to unlock your device.
From the Home screen, drag down the Notification Panel.
Tap the Settings icon.
Scroll to Security & location.
Tap Security & location.
Select a backup screen lock to use with your fingerprint.
Note: For this tutorial, we're showing how to set up a PIN. You can select a different type of security, but steps may vary based on what you choose.
Enter your PIN.
Note: Your PIN must be at least 4 numbers long.
Confirm your PIN.
Select a notification preference.
Note: Tap Hide content to prevent the content of emails, texts and other notifications from appearing on the Lock screen. You'll be notified that you have a new message, but not shown what the message contains.
Repeatedly lift and rest your finger on the Fingerprint sensor.