Similar story, friend of mine was leaving Friday Harbor to go fishing and was 5-10 minutes out of port when he made a cell phone call, talked for about 5 minutes, month later he gets his phone bill with a $33 charge for a call made from Canada, he was never in Canada and upon investigation found out that call that was well within U.S. waters, connected to a cell tower on Vancouver Is. after a long fight he got it removed from his bill but it was a major hassle.