Instruction #1


1. Press and hold the Power button.


2. Choose Power Off and then tap OK.
3. Now just wait for a couple of seconds.
4. Hold down the Power key again to turn the phone back on.

Instruction #2


1. Take off the back cover and out the battery for a short while.
2. Now put them back in/on. 
3. Switch the phone on by holding the Power button.