My iPhone is requiring a passcode and I never set one, How do I get in it?

[iMore Question]

My daughter recently tried to download a game on my iPhone. A few hours later I'm trying to use it and it won't let me without a passcode. I never set one and now am trying to guess, but obviously that's not working, any suggestions?

 

[anon(9602380)]

Welcome to iMore!

Here is a guide on how to recover a forgotten passcode. Here is another guide on how to recover your Apple ID, password or passcode.