1. Turn Off Your Call Phone First Pressing Power Key.
2. Press and hold volume up + Home + Power Key To Turn On Your Device.
3. keep pressing until show android logo on screen. when show logo on screen release all keys.
4. After That Select This Option "wipe data/factory reset" Form Android Recovery Menu use volume down key to scroll and power key to confirm.
5. than select "Yes -- delete all user data" confirm again pressing power key.
6. last step you need to select "reboot system now"
Done.
