HACK: Any way to hack into an iPhone's messages

I need to. Anybody know.plus I have a galaxy s3.

Do you understand what you are asking or doing here? You could get in a serious amount of trouble if you are hacking into someone else's iPhone's messages. What if they found out? Even if they weren't your friend, and you weren't theirs, they'd still be mad. Think about what you might do again. Think of the consequences. Don't do it.
Just don't do something you're going to regret.
Sorry if you wanted actual help with this hacking scheme of yours, but this is my advice. But if I were you, I would not think it's worth hacking into an iPhone's messages.