The disclosure is directed at a roller assembly for a mobile communication device having a top portion and a bottom portion, the top and bottom portions slidably connected, the roller assembly comprising a slide plate; a guide plate including guide rails for receiving the slide plate; an actuator connected to the slide plate and the guide plate; a shuttle portion, located within the slide plate; and a cam portion for engaging with the shuttle portion, the cam portion including an intermediate detent portion; whereby when the slide plate is moved between open and closed potions, the slide plate can be stopped in an intermediate position by the intermediate detent portion.