I have had this problem in two different cars and now with three different phones. When I plug my phone into a car charger and also plug it into the audio input jack in the console I get a very annoying buzz/whine that seems to be linked to the speed of the engine. Has anyone else had this problem? How did you fix it? The Evo needs to be plugged in while driving if I'm using GPS or it drains the battery way too fast but the noise induced in the audio system is unacceptable.