I followed the VoLTE instructions but there were a few sections that were unclear. Can you provide more detail on the following:

• Do SQN numbers need to match exactly? There is a comment about disabling or syncing this with the HSS database that isn't clear. Can we set a high L value in FHoSS instead of disabling in the USIM? Most USIMs will not have that option.
• FHoSS has a field for Op value. Can OpC be used from Open5GS? If not, can we use OpC in Open5Gs and Op in FHoSS? Or does everything need to be Op?
• Where does one set "support for Voice-over-Packet-Switched (VoPS) in NAS message to UE from EPC"? That seemed to be set correctly with the default configuration but I didn't see a setting for it specifically.

And just a few small improvements:

• Can you remove the "cat" lines left in some of the snippets? It may confuse users that are trying to copy/paste.

Big thank you for all your work on this project so far. I think once I get this authentication passing I should be successful using a stock phone and an ISIM (testing with a rooted phone and usim for now).