List of VoNR Smartphones in India?

is VoNR really necessary? isn't VoLTE good enough? also can it be activated by OTA update on iPhone 12?
 
VoNR would probably cause less battery drain as there would be no switching back and forth on 4g network for calls
 
As in OnePlus, you need to toggle the VoNR switch in Oppo phones as well in developer options. More importantly the phone stays on 5G when a call is connected unlike my other Redmi K50i where the turns to 4G for calls even when the VoNR switch had been enabled
 
VoNR and VoLTE are two different entities but smartphone companies needn't show the difference on their phones. Sometimes the indicator may not change from 5G to 4G even though the phone is switching back to 4G during calls.

Your data service and your voice service are executed separately on your phone, and the preference is left to the phone to choose. At this stage its possible you're connected to a 5G network for your data service but in the background connected to a 4G network for your voice service - even if the operator advertised a SA network. The reason for this is that 5G has many variations of implementation. An SA network can use the EPC (4G core) to transmit the voice call while using the 5GCore to transmit signalling information and regular data packets.

Since there are a mix of possibilities, and every possibility cannot be reliably indicated by the device, its pointless to try and figure out these details on your phone using an app or the phone's indicators.
 
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