Ok, there are like 50 threads with this same complaint. USE THE SEARCH BUTTON! Stop making useless threads that have this crap covered already! Stop. Hit "Search," if you need help locating that, it is at the top of the page next to where it says "Device by OS or Manufacturer." Ok, now type in that box "microphone" or hell, even "mic issue" and read the results. Read again. Reread. Then stop and think if a new thread is needed.
Oh, also, feel free to go back to iOS. No one is holding a gun to your head. And as a side note, this phone isn't even a month old yet. There will be a fix at some point. Unfortunately, some people, like me, don't hold it that high up on the list of issues.
HTC DROID Incredible - Retired
HTC Thunderbolt - AOKP Jellybean Build 2
HTC DROID Incredible 2 - Retired
HTC Rezound - Retired
Samsung Galaxy Nexus - AOKP Jellybean Build 2
HP TouchPad 32 GB - Retired
ASUS Nexus 7 - AOKP Jellybean Build 2
Samsung Galaxy S III - AOKP Jellybean Build 2