A keypad assembly for a mobile station comprises a base pad adapted to support a plurality of keys, the plurality of keys comprising a plurality of first keys and a plurality of second keys. The keypad assembly also comprises the plurality of first keys and the plurality of second keys arranged on the base pad, the plurality of second keys defined by horizontal center lines and vertical center lines of the plurality of first keys. The plurality of second keys may be further defined by outer perimeters of the plurality of first keys. The keypad assembly may further comprise a strength reinforcing plate coupled to the base pad, adapted to mechanically strengthen the keypad assembly. An alphabetic character may be assigned to each of the plurality of first keys. A numeral may be assigned to at least one of the plurality of second keys.