A method for validating the operational characteristics of a mobile phone is provided. A medium is placed on each of a plurality of placement members. The display includes the selected individual within a group represented by a first circle. A two-hinge form of the cover is also disclosed. There is also a cap covering the housing defining a solvent feed space at the front end with the solvent feed space extending radially inward for solvent feed to the rod upon rod positioning at the front end). The firing jig assembling apparatus includes a lid member attaching mechanism that attaches the lid member to a predetermined position of the firing jig placed on the table or the conveyor; and a jig delivering mechanism that delivers the firing jig which has the ceramic molded body being mounted thereon and the lid member being attached thereto, to the firing furnace.