Abstract: A method for performing handover between multiple modes for a mobile station is provided. The method includes operating the mobile station in a first mode. A handover from the first mode to a second mode is performed using a single wireless receiver. The mobile station operates in the second mode after performing the handover.

Abstract: A portable apparatus for storing a phone book has a data communication function based on a Synchronization Markup Language (SyncML) protocol and a phone book function. The phone book storage apparatus encodes an outgoing phone number selected by a user from one or more phone numbers contained in the phone book into a SyncML data format including phone call request information. The phone book storage apparatus sends the encoding phone number to a mobile phone through a data communication interface according to the SyncML protocol. The mobile phone has corresponding data communication function based on the SyncML protocol. The mobile phone receives SyncML data including phone call request information and an outgoing phone number from the phone book storage apparatus through the data communication interface based on the SyncML protocol. The mobile phone decodes the SyncML data, and sends a phone call to the outgoing phone number extracted from the decoded data.

Abstract: A data synchronizing method between a server and a client is provided. The server and the client manage database changed after a previous synchronization of data shared by them. The database includes a sync anchor field for each data item. When a sync session is initiated upon request of the client, a last anchor is detected from the database stored in the client and a last anchor from the database stored in the server. The last anchor of the client is compared with the last anchor of the server. A client change log and a server change log are generated according to a comparison result based on a database change that occurred after the last anchor of client or server when the last anchor of the client is identical to the last anchor of the server. The databases are updated according to the client change log and the server change log.