I would like to support VoLTE using an IPv4 IMS network rather than IPv6 network.  The handsets that I have been trying insist on the IMS network support either IPv6 or IPv4v6 dual stack.  After giving them IPv4v6 connectivity, I am finding that even though the handsets asked for both IPv4 and IPv6 P-CSCFs, they only try the IPv6 proxy (if only the IPv4 proxy is provided, they will not try at all).

I am wondering of anyone has worked with any LTE handsets which are willing to support IMS using IPv4 only.

Thanks,

Ron