I would just have both in the car and try it out? not 100% sure w/o the manual in front of me but I wouldn't see why not. You would just run into the problem if you're on say your work phone, and one of your buddies calls on your personal phone, there might be some interference. Beyond that I'm assuming it would work. My bro and I had both ours connected to mine. He was playing music through BT but we didn't try receiving a call on mine.