This is my first time jailbreaking and so I apologise if the answers to these questions are obvious. I'm on an iPhone 4 running 5.0.1 and plan on using the recently released untethered JB. My questions: 1) I'm performing a full iTunes backup before I JB. If I decide that I don't enjoy the benefits of JBing, and restore my phone through iTunes, will Apple know about my previous JB? I wouldn't really want to let my AppleCare go to waste. 2) I am JBing mainly for the plethora of customisation tweaks that are available through Cydia and have no interest at all in downloading cracked apps. Alot of devs have worked hard on their apps and it's not fair to them if people just go and steal them. I wish to continue downloading apps from the App Store. Will I be able to back these up to iTunes? If I do this and then restore my phone from an iTunes backup that I made while my phone was jailbroken, will Apple know that certain apps that I legitimately purchased were downloaded onto a phone that was currently jailbroken?