Calling it a milestone in the development of voice-over-LTE (VoLTE), Qualcomm and Ericsson have completed the first voice call handover from an LTE mobile network to a WCDMA network using single radio voice call continuity (SRVCC). Required for VoLTE support, SRVCC is a 3GPP feature enabling continuity of service by seamlessly switching to a WCDMA network when a VoLTE call leaves the LTE network’s coverage area. The milestone occurred on December 23, 2011 with an Ericsson network using a handset using Qualcomm’s Snapdragon S4 MSM8960 3G/LTE multimode processor. A demonstration will be available at Qualcomm’s booth at Mobile World Congress in Barcelona, Spain, February 27 to March 1, 2012. For more details on Qualcomm’s processors, visit For Ericsson’s take, visit