I have an iPhone 4 jailbroken and running 4.0.1. I want to upgrade to iOS 5 tomorrow and be able to keep all my text messages. If I let the phone back-up on iTunes (something I have avoided until now) and then restore it from that back-up once I install iOS 5 will everything be okay? Sorry if this has been asked before, I searched and could not find an answer to my exact question. Thanks for your help!