What is Volte full form ??
The VoLTE full form is Voice over LTE. How VoLTE is different from previous voice network? In contrast to the previous network generations (3G and 2G ), having separate core networks for data and voice. 3G/2G having packet core network for data and circuit core network for voice. Packet core has network nodes SGSN and GGSN. Voice core network has nodes VLR, MSC and GMSC.
LTE is the data only network means there is no separate core network for data and voice. On the roaming side, there is a single node which is called Mobile Management Entity (MME). Mobile phone uses MME for voice and data both. In previous telecom networks,
As VoLTE full form says that, it uses LTE network. LTE is a packet-based network. So the call is the VoIP Call.
When there is no VoLTE, core network falls back on 3G or 2G network for a voice call. The voice call uses SS7, which is a circuit-switched network. After the call, phone again switches back to the 4G network.