A mobile wireless communications device may include a housing having an opening therein and an inwardly extending housing ring adjacent the opening, and a switch carried by the housing and being aligned with the opening. The circuit includes first and second conductivity type transistors that are coupled between first and second reference potentials and a comparator that includes a first input node coupled to the first pad and a second input node coupled to the second pad, and that compares a potential of the first input node with a potential of the second input node. A controlled amount of coating is applied to one side of the moving fabric allowing it to be rolled up once dried by a blower and cured on the roll.