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.Press together volume up + power key
3.Select "wipe data"and press power key to confirm
4.Select "yes" and press power to confirm
5.Press power key to confirm "reboot"
6.Wait until the phone restarts
That's all!