Instruction I:


1. Power up the phone.

2. Now press and hold the Volume Down and Power buttons for a few seconds.

3. Your phone will now vibrate, reset and reboot. Congrats.

Instruction II:

1. First of all, take off the phone's back cover and remove the battery.
2. Wait a few seconds and reassemble the phone. Lastly, press the Power button to turn it on. Done!