1.Switch off your Android Phone.
2.Press and hold together
Volume Down + Power Key( If Keys Combination not work Use this General Templete )
3.Release the buttons when you see an Android icon on your mobile screen Press the Power Button to see Recovery Menu.
4.After Splash Screen a set of options will appear.
5.In order to choose “wipe data/factory reset” Plz Follow instruction on your mobile Screen to navigate and to confirm