Qualcomm Inc. has developed a modem chipset for its CDMA2000 1xEV-DO Rev. B, which it claims can deliver average downlink data rates of 9.3 Mbps via the 5 MHz spectrum. The company expects the Qualcomm Mobile Station Modem MSM7850 chipset to enable mobile TV, music streaming and VoIP calls. The device, which is due for sale later this year, is backward compatible with older EV-DO versions. Qualcomm announced it will release software upgrades for earlier Cell Site Modem CSM6800 to support Rev. B within the week. Qualcomm also unrolled single chip Rev. A systems including the QSC6085, which it is providing to WiFi provider China Unicom and phone maker Sanyo. India’s Tata Teleservices and China’s Huawei Mobile and ZTE are also QSC family clients.