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 power to confirm
4.Select "yes" and press power to confirm
5.Wait until format ends
6.Press power key to confirm "reboot"
7.Wait until the phone restart
Samsung Glaxy S2 M250s I9100 Korean Restore Factory Hard Reset Format Phone.So lets start the Samsung Glaxy S2 M250s I9100 Korean Restore Factory, Samsung Glaxy S2 M250s I9100 Korean Hard Reset.Turn Off the mobile phone for few mints.Samsung Glaxy S2 M250s I9100 Korean Remove Pattern Lock.
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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.
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