Abstract: A communication terminal apparatus including a second apparatus having a communication function and a first apparatus connectable to the second apparatus. The communication terminal apparatus includes an external communication function unit that is disposed in the second apparatus and acquires software, which is executable in the first apparatus, from an outside, a second memory that is disposed in the second apparatus and stores the software which is acquired, a first memory that is disposed in the first apparatus, and storage unit that is disposed in the first apparatus and stores the software read out from the second memory to the first memory according to a connection between the first apparatus and the second apparatus.

Abstract: A power control system for controlling power consumption of a mobile station used in a radio communication system. The power control system includes a prediction unit and an operation mode setting unit. The prediction unit is configured to predict an outside-communication-area-time taken for the mobile station to pass through a zone in which an intensity of a received radio wave from a base station detected in the mobile station is smaller than a specified value, on a basis of cell information indicating a location of the base station and a communication area, and movement history information indicating movement history of the mobile station. The operation mode setting unit is configured to set the mobile station to a low power consumption mode during the outside-communication-area-time obtained by the prediction unit.

Abstract: A communication device (for instance, a portable terminal device) uses a recording medium (UIM) storing specific user information. The communication device is provided with a processing unit (CPU) for acquiring the user information from the recording medium, a registration unit (UIM information registration area) for registering the user information acquired by the processing unit by being related to device identification information for identifying the communication device, and a transmission unit (wireless communication unit) for transmitting the user information and the device identification information to a specific opposite party. From such structure, the user information acquired from the recording medium and the device information of the communication device itself are related and managed.