I know really nothing about jailbreaking an iphone except that you can then run 3rd party apps on it not authorized by apple. I just have a couple questions which may seem basic: 1) Once you jailbreak your iphone, can you still run all your authorized apps? 2) Will it still sync back with itunes normally? 3) Will jailbreaking affect your ATT service in anyway? 4) Once jailbroken, can you un-jailbreak it back to the original iphone software?