| 摘要 |
A portable cellular phone comprises a radio communication section, an operation section, a directory memory, a telephone number temporary memory, a control section, and a display section. The radio communication section executes radio communication with a base station. The operation section lets the user input instructions for operating the portable cellular phone. The directory memory stores a plurality of telephone numbers and data corresponding to each of the telephone numbers. The control section detects a telephone number of a party on reception of a call to the portable cellular phone or on calling from the portable cellular phone. The telephone number temporary memory temporarily stores the telephone number of the party which has been detected by the control section. The control section reads out the telephone number which has been stored in the telephone number temporary memory, searches the directory memory for the telephone number, and judges whether or not the telephone number has already been registered in the directory memory. The display section displays the result of the search and judgment by the control section. The user is released from searching the directory memory and judging whether or not the telephone number of the party has already been registered.
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