Abstract: A call service method includes the steps of determining if the electronic phone book database is being used upon occurrence of a call event, searching the electronic phone book database for individual information using a phone number associated with the call event if the electronic phone book database is not being used, displaying a searched individual information and the number associated with the call event and proceeding to the call, displaying the phone number associated with the call event if the electronic phone book database is being used, and proceeding to the call.

Abstract: A call origination method and a DTMF signal transmission method. According to the present invention, a phone having a phone book function can originate a call even if a selected phone number includes characters, and a phone having a DTMF transmission code storing function can transmit a corresponding DTMF signal even if a selected DTMF transmission code has characters. For this purpose, the characters of the selected phone number and the selected DTMF code are converted to digits assigned to keys having the characters.

Abstract: A call service method includes the steps of determining if the electronic phone book database is being used upon occurrence of a call event, searching the electronic phone book database for individual information using a phone number associated with the call event if the electronic phone book database is not being used, displaying a searched individual information and the number associated with the call event and proceeding to the call, displaying the phone number associated with the call event if the electronic phone book database is being used, and proceeding to the call.