1. From the home screen, drag down from the top of the screen with two fingers to reveal the menu.
   
2. Tap the Settings icon.
   
3. Scroll to 'PERSONAL', then tap Security.
   
4. Tap Screen lock.
   
5. Tap the desired lock type.
   Note: This tutorial demonstrates creating a PIN.
   
6. Enter the desired PIN.
   
7. Tap CONTINUE.
   
8. Re-enter the chosen PIN.
   
9. Tap OK.
   
10. Tap the desired option, then tap DONE.
    
11. To change an existing screen lock, from the home screen, drag down from the top of the screen with two fingers to reveal the menu.
    
12. Tap the Settings icon.
    
13. Scroll to 'PHONE', then tap Security.
    
14. Tap Screen lock.
    
15. Enter the selected PIN, then tap OK.
    
16. Tap the desired screen lock option.