I have a "handset" with Android 2.3.4, and the "flip" feature works for every app and screen, except the desktop. That is, if I flip my phone any screen or app will flip too, yet the desktop remains fixed. There was an exception when I was playing a game and I pressed the home button: there the desktop was flipped, but it seems it was "forced" to flip by the game. How can I make it flip like any other app or screen?
If it doesn't work out of the box, which is the case with many Android phones, then you have a few different options: