then the phone app doesnt completely follow that guide line, it has the option of 'potrait' of 'automatic' or do you mean that if they can switch it must be automatic? i agree thats a bit stupid better would be 2 have 4 options: landscape,portrait,automatic,user and when it is user the program menu has a toggle button.
For one-handed use, the touch screen device cannot be used properly in landscape orientation. For these tasks a separate portrait UI mode can be provided. The Maemo 5 devices should feature a sensor detecting the device’s orientation. Switching the UI between landscape and portrait should be automatic based on the input from this sensor.