Device: Iqoo Neo 6 5G (I2202)
Firmware: PD2199BF_EX_A_13.1.12.0.W30.V000L1 (Latest Official OTA)
Network Operator: Jio 5G
Issue: Outgoing calls are not routed over 5G network. When a number is dialed, the system would fallback to 4G network, and then connect the call. Thus, considerable amount of time is wasted to complete the switching of network and then connect the call. This is very cumbersome.
The issue doen not arise during incoming call. 5G VoNR works fine during incoming calls. The voice is effortlessly carried over 5G without having to pull back into 4G network, in case of incoming calls.
The 5G outgoing call issue doesn't occur with other devices like Samsung 5G phones. So, it's not a problem from the network operator's side.
Please try to fix the issue with your next update.