I don't know whether to laugh or cry.
Since you may find that after you drive past an officer with a cell phone at your ear that you're being pulled over for a 'primary' infraction that you were completely unaware of having committed, and therefore are being cited for both that as well as the cellphone violation, I might suggest that a box of kleenex as well as a stylish Bluetooth headset might be appropriate items to add to your shopping list :-)
I don't do cell phones in cars, not even hands-free. Studies show that hands-free is better than holding it, but not by much. Apparently it's the redirected attention that makes you dangerous, not holding the phone in itself.