I just bought a new GMC truck, and it comes with this really convenient USB port where I can plug my EVO4G in directly to charge and play music from the phone, but for whatever reason (because GM sucks...), my phone really isn't fully supported. It seems that the iPhone was in mind, as well as USB sticks when this thing was developed. It usually just says that the USB device is not recognized. I can do a hack of sorts, setting the phone to USB drive mode, then switching back to charge only - if I'm quick and can unplug and replug the phone before I see "Preparing SD Card" on the notify bar at the top, the car will magically read the phone and play my MP3's. That doesn't seem like the safest option, though, and it won't recognize the phone in USB drive or charge only mode without doing that little trick. Anyone here know of a way to get the car to accept the phone without any tricks?