How reset samsung if you forget password screen

How reset samsung if you forget password screen and you can do it if your device has a problem or has other problems

but warning!!!!!!!!!!!!!!!!!
before this works you must backup your personal data because the reset All your phone data (Picture ,Videos , Contact , Music , messages etc..) will be lost.

So be careful.

instruction you can be fellow:

• Power off your phone
• Press together volume up + volume down +home button + power button
• Release your fingers of the phone when Samsung logo appear
• Choose with volume buttons "wipe data/factory reset" and select it with power button
• Choose "yes" with volume buttons and select it with power button
• Wait untiil format is complete
• Select "reboot"

Good luck