Verizon, China Unicom get on Cat M1 VoLTE bandwagon with Ericsson, Qualcomm

About the same time Verizon announced that its LTE network carried a live over-the-air LTE Cat M1 VoLTE call with Ericsson and Qualcomm, the two vendors were demonstrating VoLTE Cat M1 use cases at Mobile World Congress Shanghai 2017 with China Unicom.
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