I apologise in advance if I'm being stupid. My iPhone 3GS with iOS 4.2.1 seems to have rotation locked it's self. I didn't think this was a feature on the iPhone, but I have what I believe to be the symbol on the home screen, and the device certainly is rotation locked. I've not asked it to, was closing some open apps earlier and now the symbol is there and it's locked. Am I missing something? Short of restoring any way of fixing this? I've tried simply restarting the iPhone but still locked. The mute switch does nothing either (well, aside from mute the phone, of course). Thanks, Mark.