@MrFriday Just in case you missed my reply to you on that thread, odds are Verizon won’t play nice and let you use the librem on their networks, I was using a CDMA network and have switched to a GSM network to try and avoid any problems
BIggest GSM networks in the USA are: T-Mobile, AT&T, MetroPCS, and Cricket Wireless
Cricket is owned by AT&T, MetroPCS is owned by T-Mobile-Best of luck to you
As for VoLTE in the Librem 5, I don’t know anything about that, perhaps someone else does…