How to get into my locked iphone?

So Yesterday, I accidently forgot and left my Iphone 4s in my bathroom (It had no passcode in it) once my brother got in he thought he would be funny to change my passcode without me finding out, I won't get to him I begged for him to tell me my password to my phone but he wouldn't budge and said it wasn't him. Before you say to plug it into my computer or sync it or something I don't have a laptop or iTunes with me. So yeah, it's locked. I tried hacking into it and nothing works.

Simply go to an Apple help site or building.

Take it to the apple store and they'll have to reset the whole thing. Sorry!

Make an emergency call. Use your email contacts to find a phone number. Once you're in your email, you should just be able to press the home button and you're in. Good luck getting the code off, though. You need the code to reset it.