HOW TO BROKEN ANDROID PHONE PATTERN LOCK? Tricks

I TRY GALAXY Y AND OTHER MOBILE

1.Insert battery without sim
2.press volume up button + menu button and power on
3.show 'samsung galaxy' release all button

unlock pattern 

4.adjust volume button down to "wipe data/factory reset" click menu button
5.adjust volume button down to "yes -- delete all user" click menu button
6.reboot system now click menu button
7.after restart done enjoy