I haven't solved that problem, except for keeping the GSM phone off or away. Very annoying. I'm hoping to hear any ideas as well.
One time I was shooting some video with my DV-cam and later found that I had that buzzing noice recorded on the video when I played it back. That could be a very big problem.
I always know I'm going to get a call a few seconds before the phone actually rings because of the buzzing noise in my computer speakers. It also checks in with the service and buzzes lightly once an hour.
