Just focus on Motorola phones. The EMI from them is so bad that it will 
sound off in speakers (PC, radios, etc) many feet away, as well as do 
other neat tricks with devices never intended to notice a phone. It's 
check-ins cause it, as well as the negotiation before the ring. It's not 
just the latest flip ones either. I had an older flip and it would bring 
my monitor out of sleep a few seconds before every call.

-Skip

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