The invention presents a new way to implement a bigger keyboard in foldable mobile electronic devices terminal devices without increasing the size. The mobile terminal device is foldable, and can be arranged in a closed and in an open position, wherein in both positions a large display is at least partially visible and operable. A mobile terminal device according to the invention comprises a body, a display and at least one cover. The cover is movably attached to said body, and comprises a kinematic element to move or guide the display in a way that it is visible in the closed and in the open position.