Does anyone know if there is an external antenna that will work with the Droid? I want to be able to use the phone in my storm shelter to monitor the weather. Right now, if I stand on the steps, and hold the phone up by the air vent, it will work, but not when I'm just normally sitting down. So I want to be able to put the antenna up the air vent, and one of the car antennas would probably work. But how does it connect to the phone?(Guess I should have kept the landline.)