I just can't do the phone thing. I want to see behind my Exige the whole time I'm driving, but still want to use my phone for other things.
Use a small, cheap tablet for this instead. Walmart has the RCA on clearance for $25 today. Thought about picking one up for this but think I'll keep looking for one a higher quality screen with IPS (better viewing angles). Also would double as GPS which is nice... Often have problems with the touch interface of my Garmin GPS units.