Since buying my phone about 7 months ago I've gotten complaints from people I talk to that they get a static or buzzing sound from my phone. At first I thought the problem was that I was on the edge of the coverage area but have found this is not the only time. I just ran across an article addressing this problem which says to turn surround sounds off. Problem is there is no place I can find to do this. Anyone have any suggestions on how to fix this problem? When having this problem I've hung up and called the party back with my wife's iphone and no interference at all.