Yet another mosquito update: Jason Salvatori wrote in to say, "I'm not sure about the power problem from a cell phone, but I do know that a radio station up here (Toronto, Canada) used to play the same ultrasonic frequency with its music in the summer, and it did seem to work! I haven't listned to that station in a couple of years, so I don't know if they still do it. (99.9 FM - "Mix 99.9")."