procedure:
Samsung Galaxy S7582 S Duos 2 Hard Reset
1.Press and hold Volume Up + Home button + Power button
2.Release your fingers of the phone when Samsung logo appear
3.Volume Up and Down For Moving Curser
4.Select "wipe data/factory reset" and select it with Power Button
5.Choose "yes -- delete all user data" and select it with Power button
5.Wait untiil format is complete
6.Then Select "reboot"