1. To turn on, press and hold the Power/Lock key until the screen lights up.
   
2. To turn off, press and hold the Power/Lock key.
   Note: If the screen immediately goes dark, you did not hold the Power/Lock key long enough. Unlock your phone, and then try again.
   
3. Tap Power off.
   
4. Tap OK.
   
5. If you are unable to turn your phone on, plug the phone into a power source for 15 minutes, and then try again.
   
6. If you are unable to power your device off or if it becomes unresponsive, press and hold the Power/Lock key for 10 seconds, until it reboots.