Has anyone had a problem with loud "bursts" of static on their iPhone 3g? I bought an iPhone 3g for both myself and my wife, and I've had this problem on both phones. Neither I nor my wife can hear the "bursts" on the iPhone, but the person that we are talking to hears it on their end. The "bursts" sound like high pitched static or even screeching, and they only last for a split second at a time. There is no normal pattern to them (I've had calls with my wife from my office where I heard 3 or 4 bursts, and then other calls I might hear it once). I'm in a 3G market, so the phone is always operating in 3G mode. Anyone help here will be greatly appreciated!