Thanks, @plamen . If I can get my hands on a second brax3 I’ll be back on UT soon after, but in either case I’ll be watching the issue board for VoIP telephony & SMS becoming functional.
For the lunaros install I had hoped to use fastboot instead of spflash due to LunarOS MEGATHREAD saying “Want to install LunarOS on your BraX3? Follow this guide“ which pointed to How to Manually Install or Update the OS on Your Brax Device , which says “There are 2 ways to manually install and update your OS on the BraX3: Via fastboot [and] Via spflash tool“. I didn’t see a preference for spflash. Anyway, no biggie, I got it done. 
Thanks for all your work on this.