1. To turn the device on, press and hold the Power key.
   
2. To turn the phone off, press and hold the Power key.
   
3. Tap Power off.
   
4. Tap OK.
   
5. If you are unable to turn your phone on, plug the phone into a power source, and then try again.
   
6. If you are unable to turn your phone off with the Power key, remove and re-insert the battery.