1. From the home screen, swipe down from the Notification bar.
   
2. Tap the Settings icon.
   
3. Under the 'Display' tab, tap Lock screen.
   
4. Tap Select screen lock.
   
5. Tap Pattern.
   
6. Tap Next.
   
7. Draw the desired unlock pattern, then tap Next.
   
8. Re-draw the chosen pattern, then tap Confirm.
   
9. Tap Next.
   
10. Enter the desired backup PIN, then tap Next.
    
11. Re-enter the chosen PIN, then tap OK.
    
12. Select the desired option, then tap OK.
    
13. To unlock your device, draw the chosen pattern at the lock screen.