Well, I think I'm screwed!
I installed the latest ViperU_2.3.0.zip and, after many hours of setting it up, I tried to make a phone call... Silence.
So, I'm unable to hear any sound in calls. Sounds and mic work with everything else, but not the phone.
I've been looking into this for days now. It's not OK Google hijacking, or anything like that. I have reflashed a number of times.
I suspect the issue lays with updating with an RUU a while back. I had been using ViperU 1.8 for ages, but had many issues with ViperU 2.3 each time I installed it. So I updated with the RUU. I was able to root it and use it for months without issue.
When I flash ViperU 2.3 it says I have Android version 8. I'm certain that the RUU updated to Android 9.
Everything else works fine. I can receive calls, but there is no sound, and they can't hear me either.
Is this the problem? Is anyone aware of this issue, and hopefully a fix?
Please read my post - https://forum.xda-developers.com/showpost.php?p=80620553&postcount=1267