[Mbai2]

It's engine whine from the alternator of the car. It happens when audio equipment isn't grounded correctly. It's a common occurance when installing aftermarket amps. It's more likely a grounding problem with the car's cigarette lighter than a problem with the internal wiring of the phone. Do you still hear a noise when you plug the phone into a wall outlet? If not, you might be able to make it better by grounding it closer to the car battery.