Abstract: A system for providing mobile interactive satellite services includes a satellite operable to communicate with mobile units, a terrestrial base transceiver station operable to communicate with mobile units, and a ground station in communication with the satellite and the terrestrial base transceiver station to provide mobile interactive satellite services. The mobile interactive satellite services include a multicast component and an interactive component such that the ground station provides both the multicast component and the interactive component using the satellite, with the terrestrial base transceiver station used to provide an ancillary terrestrial component. A device for communicating with a mobile interactive satellite service system includes an antenna, a transceiver coupled to the antenna and operable to communicate with a mobile interactive satellite service system, a user input device, an output device, a processor unit, and a network interface.