a mobile communication device has a housing 1 containing battery and electronic component compartments 7 . located along a central axis of the housing 1 is a spring mounted roller 4 to which is attached a flexible liquid crystal display 9 . the housing 1 contains a compartment between the roller 4 and the outer wall of the housing 1 for storing the display 9 in a retracted position . an elongate slot 12 extends axially along the housing 1 such that the display 9 can be pulled through the slot 12 by a user to a withdrawn position in which the display 9 is visible to the user .