A mobile cellular telephone including an incline sensor arranged to detect inclination of the mobile telephone in a first plane. The mobile cellular telephone has an inclinometer mode, in which a processor receives an indication of the detected incline in the first plane from the incline sensor and controls a display to display an item at a position dependent upon the received indication. A mobile cellular telephone including first incline sensor means for detecting inclination of the mobile telephone when in a first orientation and second incline sensor means for detecting inclination of the mobile telephone when in a second orientation. The mobile cellular telephone has an inclinometer mode, in which a processor determines an approximate orientation of the mobile telephone from inputs from the first and second incline sensor means and automatically controls the display to display an item at a position representative of the incline for the determined orientation.