I have been reading up on this and still have a lot of conflicting information and confusing contradictions. I have a iPhone 3Gs running 4.0.2 on Baseband 05.13.04 Model MC131B I am a Windows user ...
After a botched attempt at jailbreaking, then removing the jailbreak, half the stuff does not work on the iPhone (apps won't sync, iPod app crashes, Settings don't "take", sync freezes the phone for 5 ...
I have looked at iOS 4.2 wrap-ups and all I can see are features for iPad. Besides AirPrint (which does not work with my printer), is there anything for the iPhone 3GS there?