The microphone setting on my IPhone as not the issue. It was already enabled. I am still having issues where not a single person can hear me talking to them via the doorbell.
I can hear them perfectly but even if they put their ear on the device itself they can hear that I am talking but it is so low that they cannot make out what I am saying. This was one of the main features that I bought this doorbell for and it has been a total fail. I am also dismayed by how long this issue has been open without a viable fix. 