A mobile wireless communications device may include a housing, a main dielectric substrate carried by the housing, circuitry carried by the main dielectric substrate, and a ground plane conductor on the main dielectric substrate. The film removal step and the sorting step are repeatedly carried out while increasing the temperature of the target material in the film removal step stepwise within a temperature range equal to or less than a highest one of softening temperatures of the films and the substrates of the coated resin products. Next, the color data is separated into a plurality of components each including an integer. This causes the POST to be started, and the POST turns off the power of the system after enabling the WOL function of the network adapter. The execution environment part, which received the notice, releases the display blocked state and notifies the application of the termination of the character input and the character input result data.