LG Glimmer / UX-830 / Vantage / Spyder

Does anyones Glimmer sound fuzzy??? When I am talking on the phone there is a hissing noise between me and the person on the other end which makes my conversation sound fuzzy! When the phone initially connects it makes a loud click noise and then I start to her the hissing/static noises and it stays there throughout the conversation. I have full bars when this happens and I have traded the phone in twice thinking it was the phone itself. A cell rep said it could be a software issue....... Is this normal.....it is driving me NUTS!!! I might trade back the phone for good if this is the way it normally sounds. I have never owned an LG before??? Please HELP!!! Is there any way I can fix it????