If you forgot your screen lock combination or password follow these steps.
Warning! All data will be lost!
1.Press together volume up + power button
2.Release your fingers of the phone when Samsung logo appear
3.Choose with volume buttons "wipe data/factory reset" and select it with power button
4.Choose "yes" with volume buttons and select it with power button
5.Wait untiil format is complete
6.Select "reboot"
