1. Press the Power button to lock the device.
   
2. To unlock, press the Power button to wake up the device.
   
3. Swipe up to unlock.
   
4. To set a password on your device, swipe down from the Notification bar, then select All settings.
   
5. Select Personalization.
   
6. Select Lock screen.
   
7. Scroll to, then select Sign-in options.
   
8. To create a PIN, select Add.
   
9. Enter your account password for your phone, then select save.
   
10. Enter the desired PIN, then confirm the PIN. Select OK.
    
11. To access your phone after the PIN is active, swipe up from the Lock screen.
    
12. Enter your PIN to unlock the device.
    
13. To change the PIN for the device, from the SIGN-IN OPTIONS menu, select Change and follow the on-screen prompts.
    
14. To remove the PIN for the device, select Remove, then select Remove again to confirm.
    
15. 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.
    Note: 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.