VoLTE Call Flow: Turing on the VoLTE-enabled devices (e.g., smartphones) connects it to the LTE network infrastructure. Then, two default EPS bearers are assigned – one for SIP signaling with a non-GBR QCI value of 5 and the other for the LTE network with a non-GBR QCI value (from 5 to 9). The QoS Class … Continue reading VoLTE Call Flow