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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1.Turn off your phone
2.Press together volume up + volume down + home button + power button until Samsung logo appears on screen
3.Browse with volume buttons and select "wipe data/factory reset" then press home button
4.Choose "yes" with volume buttons and press home button to select it
5.Wait until format is complete
6.Select "reboot system now"
7.Wait until the phone restarts
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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!
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