So the state of Illinois is hands free driving. Meaning no holding cell phones. My '09 doesn't have Bluetooth. So I bought this Bluetooth mirror which links to your cell phone. The mirror is actually better viewing area than the stock mirror and it has a slight tint instead of auto darkening. The 4.3" screen is invisible until it's activated by the reverse camera or an incoming call which displays the phone number.

 

Nice safe way to communicate, I still prefer to leave the phone switched off and out of reach, I'm old school, the calls can wait till I get home!