1. To power on, press and hold the Power/Lock key.
   
2. To power off, first press and hold the Power/Lock key.
   
3. Continue to hold the Power/Lock key until the countdown ends.
   
4. If you are unable to turn your phone on, plug the phone into a power source, and then try again.
   
5. If you are unable to turn your phone off with the Power key, remove and re-insert the battery.