1. To power the phone on, press and hold the Power key until the device powers on.
   
2. To turn off, first press and hold the Power key.
   
3. Swipe downward to power off.
   
4. If you are unable to turn your phone on, plug the phone into a power source, and then try again.
   
5. If unable to turn the phone off, press and hold the Power key until the device reboots.