Thanks for being thoughtful but I am afraid that some people will be confused by your suggestion even more, e.g. they believe your suggestion is the *soultion* to avoid the mic issue, and they did exactly that and found the phone still failed. Normal people would just get even more annoyed (they have every right to do so..)

I am not saying you shouldn't suggest some solutions, I really appreciate the contribution people like you made to this place. But when yours is a guess derived from (not-enough) statistics, it would probably be better if you say it in a less assertive way. Just my few cents, don't take it personally because I would be annoyed if I have to go through the hassle of returning the phone. I don't mind the wait, though.

To me I'd say it seems more like low-level software issue or simple hardware issue.