Abstract: A wireless network system includes: a portable terminal for transmitting a request message for temporarily stopping a content file being currently reproduced and reproducing a content file corresponding to a predetermined time alarm event set based on position information to a Digital Media Renderer (DMR) by using an Application Programming Interface (API) of a wireless network if the predetermined time alarm event occurs; the DMR for temporarily stopping the content file being currently reproduced and reproducing the reproduction-requested content file in response to the request message; and an Access Point (AP) for controlling that the content file being reproduced by the DMR is transmitted to a plurality of digital devices using the API of the wireless network.

Abstract: A mobile terminal of displaying data by individual SIM cards and a display method of sorting data according to individual SIM cards includes the steps of authenticating a SIM card that is inserted into the mobile terminal when the power is on by retrieving subscriber information stored in the SIM card and displaying data stored by the authenticated SIM card user in a different form than other data. When a mobile terminal is shared by a plurality of users, data may be displayed in different forms according to the SIM card inserted into the mobile terminal.

Abstract: A data recovery method and system for a mobile device which is capable of selectively recovering data deleted by a user is provided. The data recovery method of the present invention includes assigning a portion of a memory as a data recovery region, creating recovery lists, each comprising a recovery time and recovery volume, storing data deleted from the memory into the data recovery region on the basis of the recovery lists, displaying the data recovery lists when a data recovery is requested, and recovering the deleted data from the data recovery region when the a data to be recovered is selected from the recovery lists. The data recovery method of the present invention makes it possible to recover the data deleted intentionally or accidentally in the mobile device.

Abstract: A mobile terminal of displaying data by individual SIM cards and a display method of sorting data according to individual SIM cards includes the steps of authenticating a SIM card that is inserted into the mobile terminal when the power is on by retrieving subscriber information stored in the SIM card and displaying data stored by the authenticated SIM card user in a different form than other data. When a mobile terminal is shared by a plurality of users, data may be displayed in different forms according to the SIM card inserted into the mobile terminal.

Abstract: A data recovery method and system for a mobile device which is capable of selectively recovering data deleted by a user is provided. The data recovery method of the present invention includes assigning a portion of a memory as a data recovery region, creating recovery lists, each comprising a recovery time and recovery volume, storing data deleted from the memory into the data recovery region on the basis of the recovery lists, displaying the data recovery lists when a data recovery is requested, and recovering the deleted data from the data recovery region when the a data to be recovered is selected from the recovery lists. The data recovery method of the present invention makes it possible to recover the data deleted intentionally or accidentally in the mobile device.