Apple has released its iOS 4.1 Beta 2 and the accompanying SDK. Reports are varied as to whether this second version of the iPhone and iPod touch operating system includes a fix for the iPhone 4’s proximity sensor issue, a problem iOS 4.0.1 failed to address; Apple has yet to indicate one way or the other. Both the new iOS 4.1 SDK Beta 2 and pre-release builds are available now for download by paid iPhone developers from the iPhone Dev Center.
Apple releases iOS 4.1 Beta 2

Charles Starrett
Charles Starrett was a senior editor at iLounge. He's been covering the iPod, iPhone, and iPad since their inception. He has written numerous articles and reviews, and his work has been featured in multiple publications.