I find it doesn't even work well for that. It seems like only 4 out of 5 occasions that it connects to my phone (and never connects to my wife's) without manual intervention.
In fact, the other day I got into the car and I was pleasantly surprised that it connected to my phone immediately while I was parked in the garage. I hit the garage door opener and it didn't work. I realised I'd forgotten to plug the door opener back in. I left the phone in the car, got out, turned the garage light on, plugged the door opener in and go back into the car. My phone was still connected. I opened the garage door and realised I'd left the garage light on, so I got out, turned it off and go back into the car. My phone was no longer connected. I had to reconnect it manually. The phone had been sitting in the car the whole time.
I have no idea how the software developers can make the software work so inconsistently.