Abstract: A mobile device that is capable of accessing different types of networks such as a circuit-switched network and a packet-switched network is disclosed. A dynamic anchoring mechanism is invoked when the mobile device determines that a circuit-switched call is to be handed over to a packet-switched network.

Abstract: In a communication system providing broadcast services in which files for broadcast are accessible by the users. Contents of the broadcast files and the file attributes required to process the broadcast files are separately sent. As arranged, receiving the file attributes ahead of the content files allow more efficient download and processing of the broadcast files.

Abstract: A wireless telecommunication device and method of generating a domain ID from the wireless telecommunications network identifier of other communicating devices, such as a telephone number or mobile identification number (MIN), and creating a SIP URL to direct communications across a TCP/IP capable network. The wireless telecommunication device can generate more than one domain ID for same network identifier, and can include geographic information in the domain name to provide additional information about the other communicating device within the SIP URL address.

Abstract: Methods and apparatus for sending information to a target mobile station include compressing the header portion of short data burst messages before being sent to the target mobile stations, and decompressing the header portion of the received short data burst messages at the mobile stations.