3 terms
VoLTE, or Voice over LTE, carries mobile phone calls as IP packets over a 4G network using IMS, giving HD voice and faster call setup.
VoNR, or Voice over New Radio, carries phone calls as IMS voice over a 5G standalone network, so the call stays on 5G instead of falling…
Wi-Fi calling lets a phone make and receive operator calls and texts over any Wi-Fi connection, using the same number and the operator's IMS core.