Wireless communication terminal synchronization method, wireless communication system, wireless communication terminal, and server

A wireless communication system comprising plural wireless communication terminals at least communication operation of which is enabled by mounting a subscriber information card recording subscriber information, and a server that is connected with the wireless communication terminals via a communication network, said server comprising:

• a communication means which performs data communication with said wireless communication terminals via the communication network;
• a storage unit which includes a storage area to store a copy of the data stored in said plural wireless communication terminals;
• and
• a server side synchronization means which synchronizes the data of a user stored in the wireless communication terminal and stored in the storage unit according to a request from said wireless communication terminal;
• each of the wireless communication terminals comprising:
• a card mounting means which detachably mounts a subscriber information card;
• a wireless communication means which is operable when said subscriber information card is mounted;
• a memory means which stores user data;
• and
• a terminal side synchronization means which requests execution of synchronization to said server after said subscriber information card is mounted, and uploading or downloading of data is executed with said server as required;
• and
• at least either one of said server and each of said wireless communication terminals further comprising:
• an authentication means which allows only plural wireless communication terminals possessed by an identical user, to perform synchronization as to the user data of the user in the storage unit of said server.

A wireless communication terminal at least communication operation of which is enabled by mounting a subscriber information card that records subscriber information, said terminal comprising:

• a card mounting means which detachably mounts a subscriber information card;
• a wireless communication means which is operable when the subscriber information card is mounted;
• a memory means which stores user data;
• and
• a terminal side synchronization means which requests execution of synchronization to the server on the communication network after the subscriber information card is mounted, and executes uploading or downloading of data with the server as required.

A server being connected via a communication network with plural wireless communication terminals at least communication operation of which is enabled by mounting thereon a subscriber information card that records subscriber information, said server comprising:

• a communication means which performs data communication with said wireless communication terminals via the communication network;
• a storage unit which has a storage area to store a copy of the data that is stored in said plural wireless communication terminals;
• a server side synchronization means which performs synchronization with said wireless communication terminals for user data stored in said storage unit, in accordance with a request from said wireless communication terminals;
• and
• an authentication means which allows only plural wireless communication terminals possessed by an identical user to perform synchronization for the user data of the user in the storage unit.