Hi, I posted earlier that the mic in FaceTime stopped working for me the other day. I've just discovered that any video recorded on my iPhone over the last few days has no audio except for a low hissing sound. On Christmas Night, the iPhone fell and may have hit concrete - I thought it only hit the carpet as I didn't hear it fall. It was a one in a million chance that it fell where it did in a gap in the carpet and I only had a stupid plastic cover on it as my regular cover was very dirty and grimy - plastic one only went around the side and did not cover any part that had buttons, like the top. Does it sound to you guys like the mic is broken? Could something be done?