I have been having trouble using my mic ever since launch. The problem is it works 45% of the time. The mic gets power and sometimes it will work when I restart my console, but the majority of the time it doesn't. I've tried a completely new controller and mic and still no go. I'm really hoping it isn't the console itself having a problem. I do not want to wait for a new console. I guess this is what I get for buying one at launch.
Also, I just want to note that the launch controller was faulty and I had to buy a new one after contacting microsoft for a new one and I was told they couldn't do anything about it. But TWO months later, I got a new controller randomly in the mail.