1. To lock the device, press the Power/Lock key.
   
2. To unlock the device, first power on the screen by pressing the Power/Lock key.
   
3. Touch and hold, then drag the Lock icon to the center of the screen to unlock.
   
4. To set a security lock: From the top of the home screen, swipe down with two fingers. Then tap the Settings icon.
   
5. Scroll to, then tap Security.
   
6. Tap Screen lock.
   
7. Tap the desired screen lock type.
   Note: 'Pattern' is selected for this tutorial.
   
8. Drag your finger from dot to dot to create a lock pattern.
   
9. Confirm your lock pattern by entering it once more.
   
10. To change the lock code: Swipe down with two fingers from the Notifications bar > Tap the Settings icon > Security > Screen lock > tap the desired lock code.