An apparatus for notification of a circuit switched event in a mobile station. The apparatus comprising a circuit switched modem, a packetized data modem and a radio. The circuit switched modem, configured to communicate circuit switched data over a circuit switched network. The packetized data modem, configured to communicate packetized data over a packetized data network. The radio, configured to couple the packetized data modem to the packetized data network via a packetized data radio link, and configured to couple the circuit switched modem to the circuit switched network via a circuit switched radio link, wherein said radio comprise one transmitter and two receivers.