I am suddenly having the same call quality issues i had before as described in this past thread:
“Audio drops out, digitizes. A call will start on Wifi, but then hands over to cell, where the quality is even worse at times. Its ranges from moderate to severe.”
I can force a call to stay on wifi, or on cell, and it still is breaking up badly.
I just a few hours ago, updated my 1st gen Pixel XL to the Sept 2018 Security Android 9.0 update OTA. I had made a call eailer, before the update and things were fine.
I have cleared the R.W. app cache, and done the VOIP reset and rebooted.
Anyone else with a Pixel having call quality issues since this months update?