Six weeks ago, I switched my OnePlus 6T (running /e/ for the last 6 months) from T-mobile-USA to Verizon. After some initial troubleshooting with Verizon tech support (a web search on “Verizon OnePlus 6T” will explain the various issues…) I was able to get everything to work successfully.
Things were good until a few days ago I updated to 0.9-20200625. This seems to have broken voice calling and SMS. I still have data and MMS. Verizon will not help at this point (they say I need to factory-reset the phone…) I tried a cheap prepaid Verizon-compatible SIM in my 2nd SIM card slot but that has the same problem. So the problem is not with the SIM, or something specific to my Verizon account. The timing of the problem points to the /e/ update.
I don’t really know how to start troubleshooting this. I am wondering if maybe reverting to the last /e/ version is the best interim fix, but also not sure how to go about that. I can follow instructions well enough to install /e/ but I’m nervous about going backwards. Can anyone help, and have other OnePlus 6T/Verizon users encountered the same problem?