I'll laugh if he gets a rev. A again... But I guess we'll never know.
On a serious note ; I don't know why this bothered you so much. Not all REV A phones had the microphone issue. If yours did not, then this means you just made the "REV A" marki...
May be there is some conflict
Sent from my HTC One_M8 using Tapatalk
Since the bug is also seen on the GPE version of the HTC One M8, sorry to disappoint you but I really doubt it is related.