How do I go about unjailbreaking my iPhone 4? Nothing's wrong, I just want to have a "pure" phone again, and be able to upgrade without having to worry. I think I used green poison. The thing I'm most concerned about losing is my music. Please help.
There are several 3rd party apps that can take music from your iPhone and put it on your computer...once you've selected one and you transfer your music, then it'll just be a simple restore and reloading of your music to your iPhone again.
There is also the route of re-downloading music through iTunes, which isn't always a guarantee...yet.