Make Sure Your Device is turn off. if your device hang or freezing remove battery and insert it.
1. keep pressing volume up + down Now press power button to turn on your device until show logo on screen.
2. Press Home Button To enter the recover mode.
3. Use Volume Down button to Scrolling and select wipe data/factory reset now press power button
4. than select Yes and confirm.
5. After that chose reboot system Now wait Few second
Done.