warning : Don't Forget Backup Your All Impotent Data Like Contact, Message, Videos, Photos others data. after hard reset all data will be lost.
For Hard Reset Battery Charge Need 70% Up. it's impotent For Your Device don't hard reset if your device battery is low.
1. At First Press And Hold Power Key Until Turn Off your Call Phone. when turn off your device remove battery and reinsert.
2. After than Press And Hold Together Volume Up + Home + Power Key Until View Samsung Logo On Screen.
3. Now Show screen android recovery menu than Select this option "wipe data / factory reset" Press power key to Confirm.
4. Than use volume down key to scroll and select "Yes -- delete all user data" again press Power key To Confirm.
5. After Few Second hard Reset Complete than Select This Option "reboot system now" press power key to done.