My 720 Rant #1...\r\n\r\nWhile using the hands free feature, the person on the other end of the phone hears a loud squealing noise over my voice. It seems to only happen when I am speaking. It is quiet without squealing when I am not talking. I cannot hear the squeal on my end. What is the cause of the and is there any word from TT on a fix? Is this microphone feedback?