1. To lock your device screen, press the Power/Lock button.
   
2. To unlock your device screen, press the Power/Lock button.
   
3. To add an additional security lock, swipe down from the Notification bar, then select the Settings icon.
   
4. From the DEVICE tab, select Lock screen, then select Screen lock.
   
5. Select Desired screen lock type.
   Note: For this demonstration Fingerprint was selected.
   
6. Swipe finger over Home button, lift it off, then repeat 8 times
   
7. Select DONE.
   
8. Enter a backup password of at least 6 characters, including at least 1 letter and 1 number and select CONTINUE.
   
9. Reenter the backup password and select OK.
   
10. Select display options for notifications on the lock screen, then select DONE.
    
11. To lock your device screen, press the Power/Lock button. Your device now has a fingerprint screen lock type.
    Note: To set the amount of inactivity time before the screen is locked, select Secure lock settings > Secured lock time > Select the desired amount of time.
    
12. To unlock your device screen place your finger on the Home button.
    Note: To change lock screen notification options from the home screen select Settings > Lock screen and security > Notifications > Notifications on lock screen.
    
13. To register additional fingerprints, from the DEVICE tab in Settings, select Finger Scanner.
    
14. Select Fingerprint manager.
    
15. Confirm your identity by swiping your finger on the Home button.
    
16. Select the Add icon.
    
17. Select OK.
    
18. Repeat Steps 6-7.
    
19. To deregister a fingerprint select and hold the Desired fingerprint from the Fingerprint manager.
    
20. Select the Delete icon.
    
21. Select OK.
    
22. To change your security lock type, from Settings, select Lock screen.
    
23. Select Screen lock.
    
24. Confirm your identity by entering your backup password, then select CONTINUE.
    
25. Select Desired screen lock type and follow the onscreen prompts.
    Note: To learn more about requesting a device unlock for your AT&T mobile device so that it can operate on another compatible wireless network, visit www.att.com/deviceunlock. If your device is locked and is requesting a "PUK" code, click here for instructions on how to obtain your PUK or PUK2 code to unlock your SIM card.