sounds on my car speakers. I know why, but how do stop it? My cell phone, an iPhone, causes noise interference popping sounds on my car and computer speakers. I know why (it's because AT&T's GSM network uses an audible frequency which is amplified through my speakers when connecting to the cell towers), but how do I stop it from happening? Better insulated speaker wire? Should I wrap my speakers in foil? Buy some type of filter? What can I do to STOP this without having to buy all new stereo equipment? And I won't accept the "move your phone farther away from your speakers" answer. Please help, it's really annoying! Thanks!