A mobile handset call testing system and method. The structural material may further comprise a filler component. Also, a method of manufacturing an expandable medical implant having a thicker peripheral portion and a thinner interior portion. When confirmation is made about the fact that the person is authentic, the parameter is extracted from the total personal password to be judged. This enables more reliable wireless communication with the main body of the ear canal. and after the process has ended the dusts are inerted by blasting oxygen-containing gas back into the pressure vessel, and to a device for carrying out the method.