[Fixup]

Automatic rotation sucks, no matter whatever. I simply use the registry trick posted here to prevent gsensor DLL from loading to disable universally this gsensor crap. When I do need to rotate, I run RotateScreen, mapped to the send key. Works 100% of time and exactly when I want.

It makes sense for iPhone to use automatic rotation as it does not have a spare button for it. iPhone also did it right by preventing further rotating after twice, so you can avoid unwanted rotation when you turn your body on bed. As long as those WM copycats cannot do that, they are better not used.