iOS 4.2 was delayed to the point of never being released. Apple went straight to 4.2.1 instead. http://www.iphonehacks.com/2010/11/developer-reports-major-voip

iOS 4.2 was delayed to the point of never being released. Apple went straight to 4.2.1 instead. http://www.iphonehacks.com/2010/11/developer-reports-major-voip-bug-in-ios-4-2-gm.html http://www.iphonehacks.com/2010/11/developer-reports-major-v... Source: I found/reported the bug mentioned in the article.