A recording medium readable by a computer, said recording medium recording a program for executing a method of transmitting a response message in a cellular mobile telephone apparatus comprising a cellular mobile telephone body and an incoming call communicator for communicating with said cellular mobile telephone body, comprising the steps of:
- said cellular mobile telephone body storing at least one message for responding to a calling party in a memory;
- said cellular mobile telephone body notifying, in response to an incoming call received from a calling party, said incoming call communicator of the reception of the incoming call;
- said incoming call communicator notifying a user of said cellular mobile telephone apparatus of the reception of the incoming call when said incoming call communicator receives the notification of the reception of the incoming call from said cellular mobile telephone body;
- said incoming call communicator transmitting response information to said cellular mobile telephone body when said user responds to said notification of the reception of the incoming call;
- and
- said cellular mobile telephone body transmitting said message to said calling party when said cellular mobile telephone body receives said response information from said incoming call communicator.