You can also try dr.fone - Android Lock Screen Removal to bypass pattern, PIN, password & fingerprints for Android devices with NO DATA LOSS: \r
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Warning! Do this at your own risk! All your phone data (conts,photos,videos,music,messages,aplications,games,files,) will be lost! Please make backup first if you can!\r
If you forgot your screen lock combination follow these steps.\r
1.Power off your phone\r
2.Press together volume up + volume down +home button + power button until Samsung logo appears\r
3.Choose with volume buttons wipe data/fory reset and select it with power button\r
4.Choose yes with volume buttons and select it with power button\r
5.Wait untiil format is complete\r
6.Select reboot\r
7.Wait until the phone restarts\r
Thats it!