Originally Posted by ALurker
Some phones are more susceptible to ground loop interference (caused by the alternator I think?) than others when connected to the audio system in your car. This might be what you're experiencing. It typically sounds like hissing or whining but I guess could cause popping as well. I've had this problem in my car using only certain phones and I bought a PAC ground loop isolator a year or two ago and I haven't had a problem since.
Ordering one right now . Thanks. We shouldn't need to do this with the best phone made. I didn't need it with the Old Droid X first Gen.