VoLTE Setup Failure While Downloading on ENDC going on

Hi Expert,

Could someone please suggest what could be the reason on VoLTE setup failure while we have ongoing 5G downloading session?

@RFSpecialist and @Hainm Could you guys please assist ?

in NSA, 4G is for signaling. After attached 4G/5G, UE context is managed by enodeB & MME.
I suggest you to collect S1 L3 message tracing to know when VolTE setup request, MME will ask enodeB to modify UE context, maybe enodeB reply with a failure, you can find the cause.