Instruction I:
1. Hold down the Power button in order for the menu to show on screen.
2. Choose the Power off option.
3. After a couple of seconds, hold down the Power button again. Your phone will turn back on. Voila.
1. Hi. Please, remove the phone's back cover and battery.
2. Wait a few seconds and reassemble the phone. Lastly, press the Power button to turn it on. Done!