Chosen Solution
hi! i have an issue whit an iphone 6 the microphone is not working either on regular call , handfree, or even bluetooth i tried replacing both microphone top and bottom i also tried put on and off noise reduction soft reset hard reset ios update and DFU so at this point i dont know where to look for to solve this problem
Considering everything else you have tried it is probably an issue on the logic board somewhere, I would get someone who has experience with logic board repair to have a look at it.
Hey Old pal! Heres a post I wrote on iPhone 6 microphone problems If this dosent help I think you’ll need to replace the ic on the board Did you have any luck? Blue skies BT Hope things are going well!