| 摘要 |
PROBLEM TO BE SOLVED: To facilitate rewrite of a software program of a user interface of a mobile telephone set and to reduce the memory capacity of the mobile telephone set. SOLUTION: A communication system of a mobile telephone set 100 connected to networks 130, 402 is provided with external user interface processing sections 119, 120 connected to the networks and storing menu information corresponding to key operation information and a menu transition control section 103A that transmits the key operation information of the mobile telephone set to the external user interface processing sections to extract corresponding menu information, receiving the information and displaying the information as a new menu.
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