Abstract: A mobile communication device comprising a rotary input device, wherein the rotary input device comprises an optical sensor configured to sense rotation of the rotary input device and a processor coupled to the rotary input device configured to process input from the rotary input device. The rotary input device can, in an embodiment provide rotation inputs and keypad inputs.

Abstract: A mobile telephone handset includes an elongated housing having a carabiner latch pivotally attached at a battery door on the rear side of the housing. The carabiner latch includes a hook portion having a spring-biased latch pivotally attached thereto for attaching the latch to a support element, such as a strap, loop or ring attached to a back-pack or other article of wearing apparel. The latch is stored within a door recess that receives the latch for storage purposes. The latch can be swung outwardly away from the housing to a variety of positions. A cylindrical projection is disposed within the door recess for frictionally receiving a central opening of the latch. A finger grip recess disposed within the door facilitates the grasping of the latch when it is disposed within the recess to facilitate swinging it away from the housing and out of the recess.