1. From the home screen, tap the Menu icon.
   
2. Tap Settings.
   
3. Tap My device.
   
4. Tap Lock screen.
   
5. Tap Screen lock.
   
6. Tap PIN.
   
7. Enter the desired PIN.
   
8. Tap Continue.
   
9. Re-enter the PIN to confirm it.
   
10. Tap OK.
    
11. To change the PIN, tap Screen lock.
    
12. Enter the required PIN.
    
13. Tap Continue.
    
14. Tap PIN.
    
15. Enter the new PIN.
    
16. Tap Continue.
    
17. Re-enter the PIN to confirm.
    
18. Tap OK.