You can also try dr.fone - Android Lock Screen Removal to bypass pattern, PIN, password & fingerprints for Android devices with NO DATA LOSS: https://goo.gl/sEpYPY
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Warning! Do this at your own risk! All your phone data (contacts,photos,videos,music,messages,aplications,games,files,) will be lost! Please make backup first if you can!
1.Power off your phone
2.Push together volume up + home button + power button until Samsung logo appears on screen
3.Scroll with volume button to "wipe data/factory reset" and press power button to confirm
4.Select "yes" and push power button to confirm
5.Wait until format ends
6.Press power to confirm "reboot"
7.Wait until the phone restarts
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