Which phone? People have shifted from Airtel 5G to Jio 5G because Airtel 5G is scam mostly(300GB monthly or some don't get data only). That's why speeds have reduced to 100-200Mbps mostly. In metro cities, where density of building is huge, Jio 5G switches to 700Mhz and speeds are reduced to 50-60Mbps mostly. Airtel and Jio plans are same mostly. So people prefer Jio at the moment. VoLTE and VoNR are new technologies, Jio will take time to implement.