Iphone 11 Pro Calls Issue
I have the following issue with my Iphone 11 Pro (latest IOS 13.2.2 installed). During a call, the other side cannot hear me well (garbling sound). This happens using the airpods or when I do not use bluetooth at all. The issue is not fixed even if I hang up and call again, unless I restart my phone, or turn on airplane mode and turn it off again. Then, it is fixed for a short term, until it eventually re-appears. I tried resetting Network Settings, and after that did not work, I totally erased my phone and set it up from scratch. The problem however remains. Any help please?
iPhone 11 Pro, iOS 13