Instruction 1
1. First of all, power up the device.
2. Time to employ some manual dexterity! Press and hold three buttons at the same time - Delete + left Alt+ right Shift. This will cause your phone to reset.
Instruction 2
1. Take off the phone's back cover and pick out its battery.
2. After a couple seconds put the battery back in and cover it with, well, the phone's back cover.
3. Now power up the phone. No do that, press te Power button.