Hi I am going to DM you about this situation with your modem and VoLTE.
It is getting so close. Purism recently helped me figure out my VoLTE issue and without even thinking about it, I’m almost using it as a daily driver for the last week. If things keep going well I might switch the SIMs and see how it goes!
It certainly isn’t for mainstream yet, but as a big Linux and open source fan it certainly fills the need I have. I’m starting to investigate the code repositories more and was even compiling projects on it a few nights ago in docked mode. I Hope to soon attempt to make a few changes to fix some of the rough edges of the UI experience I’ve been having and then it will work even better for day to day use.
I think / hope that once some of these hardware issues get resolved the momentum could really build on this.