I really feel badly for you that you are having so many problems.
My experiences over the past several months with my three different iPhones and the microphone issue were so frustrating. I got irritable at one point with one guy and he just kind of shrugged it off.
With all the other crap that we have to deal with this was one problem that really got to me.
Right now it seems to be resolved but I keep waiting for something to happen because I do not trust this phone. Also, at one point, one of the advisers mentioned that he was aware of a microphone issue. Then he backtracked and kind of denied this. They are trained not to reveal any information about what is going on with complaints from other customers. Until there are thousands and thousands of people complaining about the same issue they will not address it.
That’s what happened with my 6S phone. It’s suddenly started to take a dive with the battery going from 90 to 20 in two minutes.
That was because of all the updates they were doing and so many people complained that after five months they admitted it was their problem. Instead of giving free batteries which is what they should’ve done they made the generous offer of only charging $30 rather than 80 to replace the batteries.
I know other people with that model phone and nothing happened to their phones. I would’ve kept that phone because it was fine and the photos were just as good if not better than the 8+. I see nothing great about this phone except that it is heavier and his cries me a tremendous amount of stress.