A rear operation body is attached on a rear portion of a front case via a pair of front supporting plate springs. At least one of the shield shell of the first connector and the shield shell of the second connector is made by diecasting. One or more balancing plugs may be disposed within the rotatable body in a first orientation such that their respective centers of gravity are disposed within a first plane. The invention improves the quality and reliability of communication for WLAN users thus increasing the data transfer rate. Forward link transmissions from a base station to a plurality of user terminals are patterned such that transmissions to adjacent user-group areas do not occur during the same time intervals. An upper level interconnect feature is landed on the selective via post to electrically interconnect with the lower level feature.