I want to keep iOS 5 on my ipad (and still use the iOS 5 for development testing). But I want to also test with iOS 6 on my iphone. I am under the impression that I need to update itunes to upgrade to iOS 6. What does that do to the rest of my iEcosystem, ie, apple TV, iCloud, App purchase sync, Music, etc? Is there a guide? Yes I searched but I get too many results.