It will remove all the data ,contacts and apps that you installed
1.Power off your phone
2.Push together volume up+home key+power button
3.Select with volume keys "wipe data/factory reset" and press home to confirm
4.Select "yes" and press home to confirm
5.Wait until format ends
6.Press home key to confirm "reboot"
7.Wait until the phone restarts
Samsung Glaxy Grand I9082 Duos Restore Factory Hard Reset Format Phone.So lets start the Samsung Glaxy Grand I9082 Duos Restore Factory, Samsung Glaxy Grand I9082 Duos Hard Reset.Turn Off the mobile phone for few mints.Samsung Glaxy Grand I9082 Duos Remove Pattern Lock.
Restore Hard reset will set your phone in origional factorry settings. It will remove all the data and apps that you installed. Your contacts will be removed and you have to add them again.