Gcrew

It’s been 3 month since I took delivery of my new 2019 Chevy Trail Boss and really hate that when I use the phone to call out the person on the other end can’t hear me. This is the same whether the Apple iPhone is connected to car play or via Bluetooth. Also same problem when I initially called on star to set up service. They couldn’t hear me. First thought it was cell phone reception but was not the case. First time the dealer replaced the mic over the drivers side but this didn’t fix the problem. Updated latest software updates and this too didn’t fix the problem. Took it back to Chevy dealer Monday they called today and said they can’t replicat the problem. So drove up from work in the loaner and replicated the problem. Same problem on iPhone or Android. Has as anyone else had this issue or has any tips to resolving the issue? thanks