Instruction #1


1. Heyoo. Lets get started. First, press and hold the Power button.



2. Next, do choose the Power Off option. Tap OK.

3. Just wait for a couple seconds.

4. Now hold down the Power button again to turn the phone back on. 



Instruction #2


1. To begin, remove the back cover and the battery for, say, ten seconds. 
2. Afterwards, put everything back in its place.
3. Now switch the phone back on with the Power button.