Heh - same sort of timeframe - probably a Nokia 8210 though - I could reliably have my Apple hockey puck mouse "crash" if my phone got an incoming call while it was sitting on my desk in a loop of the usb cable for the mouse. It'd just stop working, and need unplugging/replugging to get it working again.

It was clearly electromagnetically "noisy", but I do't recall ever having heard any on my phones make any unexpected audio noise... (My old-and-abused rock concert and motorcycle weary ears probably can't get up as high as inverter whine any more though...)