When hanging up on a call, press the home (house-shaped) button repeatedly. You should then be able to access your phone and therefore, your security settings. Be careful, the lock screen will still be there, but you can bypass that by sliding the screen open.
Enter you gmail account and password it should then ask you to make a new code and then your set....
Go to a shop tht unblocks phones... God.
I tried the gmail but it says it is wrong but I went right on my gmail on my computer