Under IOS7, IPhone 4s. Can not see your screen on TV or projector apart from some specific applications: Safari so if it is to watch a video, YouTube is not, the video from tape-announcement AppStore yes. To work around the problem with YouTube, I use Google App, which offers me a tab to access YouTube, and it's good. The cable is solidly built, but the manufacturer is the thank you of changes in the phone's operating system.