How to break a passcode on an iphone?

How do you break a passcode on an iphone?

I think you have to go to the apple store to prove that it's yours and then they will take it off

Take a hammer to the lock screen. Should be broken in no time.

Go to the Apple store because they will know if the iPhone is yours or not. Theft is a dumb pathetic crime. If you stole that phone, you will get what you deserve. If not, they will fix your issue.