Instruction I:


1. Begin with some manual work. Carefully remove the device's back cover and battery.
2. Do nothing for five seconds and then put everything back in place. Press the Power button.

Instruction II:

 

1. First, press'n'hold the Power button until your phone turns off.

2. Second, turn the phone back on - press the Power button again.
3. You have completed the soft reset. Yeah, it is that easy.