Mobile telephone, telephone number managing server, telephone number changing system, telephone number requesting method, and telephone number requesting program

摘要

It is desired from the viewpoints of accessory and economy to make common use of one telephone number among a plurality of mobile telephones. A server makes an ID intrinsic to a mobile telephone and a telephone number correspond to each other thereby to relay communications between the mobile telephones made to correspond. A mobile telephone requests the server managing the telephone number and the ID of the mobile telephone from itself via the Internet, to change the correspondence between the telephone number and the mobile telephone ID. In response to this request, the server changes the correspondence between the telephone number and the mobile telephone ID.