1. To lock your device and put it to sleep, press the Power/Lock key.
   
2. To wake your device, press the Power/Lock key.
   
3. Touch and hold the Lock screen to unlock the device.
   
4. To set up a security lock, from the home screen, swipe down from the Notification bar with two fingers.
   
5. Tap SETTINGS.
   
6. Scroll to then tap Security.
   
7. Tap Screen lock.
   
8. Tap the desired option.
   Note: For this demonstration, tap 'Pattern'.
   
9. Draw the desired unlock pattern, then tap Continue.
   
10. Re-draw the chosen pattern, then tap Confirm.
    
11. To unlock your device, draw the chosen unlock pattern at the lock screen.
    
12. To change the security lock type, from the Security screen, tap Screen lock.
    
13. Draw the current unlock pattern.
    
14. Tap the desired option, then follow the on-screen prompts, to set up.