In a mobile communication device, a scanning operation is performed with use of a wireless transceiver to identify one or more available wireless communication networks in a given coverage area. The push member is slidable along the guide rail and toward or away from the through hole so as to move the hair-removing plate away from or toward the base plate. The image data indicates a layout of a plurality of normal chips and a plurality of abnormal chip on a semiconductor wafer. Thus, wavelength conversion resources assigned to a group of wavelengths are usable by any wavelength in that group. For each tooth, the method automatically identifies a line or path along the surface of the model linking the saddle points to each other, the path marking a transition between teeth and gingival tissue and between adjacent teeth in the model.