If you forget your password on Galaxy S3 or you have applied a pattern lock and forget your pattern, then there is no need to worry. You can unlock your Samsung’s Galaxy S3 with this easy method.

But remember all your data on your mobile will be lost by applying this hard reset method. Do it at your own risk.

If you forgot your screen lock combination follow these steps.
1.Switch Off your phone by long pressig power button
2.Press these keys together,  volume up + home button + power button
3.Release these three buttons when Samsung logo appear
4.Choose with volume down/up  buttons “wipe data/factory reset” and select it with power button
5.Choose “yes” with volume buttons and select it with power button
6.Wait until format is complete
7.Select “reboot”

And its all done. You are ready to go, set up your galaxy S3 and you can use it with ease.