Nice. Similar, I got the N100 off the bay to give a try. VoLTE now works good in USA with Tello /Tmobile, at least in my area, that was certainly a show stopper for some time, huge win!

Got OpenVPN working, uWolf runnng my NextDNS so can filter/watch the logs, MMS has some issues, no RCS as you mention.

As you say, not quite there, but good progress overall. Hope for continued progress, and love to see the many more posts on it than ever before!

Using a privacy focused Android phone project for now, but long term the real answer is Linux or some other new project to tear away completely from Bigtechs dependency & stranglehold. Thanks for your adding development to the cause!