I searched around but really couldn't find an answer... I'm looking at getting an iPhone 3G. My question is if there is a way to have the iPhone set so Bluetooth only turns on when external power is applied? That way I don't drain my battery when it is not plugged in. Case in point, I have Bluetooth in my BMW and would like to be able to just plug it in and have Bluetooth turn on automatically on the iPhone and have it pair with my car's system. Thanks.