Seeing this question made me think about upgrading my iPhone 3G to iOS 4.x, if that's still possible. I've deliberately kept my iPhone 3G on iOS version 3.1.3 because that's the final 3.x version; I ...
One evening, the screen of my iPhone 3g would no longer rotate. It was working fine that morning. I haven't updated or installed any applications.
Does the Nike iPhone Sport Kit will work on a 2nd generation iPhone that has the 3.0 update applied? In the Q&A on the website, some say it will, but others say it only works on a 3GS iPhone.