So only recently I have been getting this problem where I initiate a call or someone calls me and they can hear me for the first couple seconds and then it gets muffled and they can't hear me but I can hear them. This has been going on with every call. I troubleshooted the device with apple support and the microphone works fine as voice memos come in clearly so apple thinks its a verizon issue. I have the Iphone 7 256GB Jet Black, if that matters.
I might also add that I've tried network reset and power off and reboot.