How To Fix iMessage/Facetime/Email/Etc Push Notifications In iOS 7 Beta

If you got your hands on the developer beta build of iOS 7, you might be having an issue with push notifications, including iMessage, Facetime, Email, etc. The error message you might be getting is "Connect to iTunes to Use Push Notifications". Lucky for you, there's now a fix by the jailbreak group RedSn0w. IMPORTANT: [...]