We've done this in numerous rental cars. Many variations of the same problem -- it picks the phone it picks. We've had to resort to deleting one phone from th

We've done this in numerous rental cars. Many variations of the same problem -- it picks the phone it picks. We've had to resort to deleting one phone from the car (and the phone's bluetooth) to get it back on the other phone. It's inconceivable how the pairings are so bad and there isn't just a button for each phone connected that just works. Even when switching does work, all it takes is one blip and it hops over the other phone. Again, this is on multiple cars on long road trips where we have at least two people to work on it and literally hours to figure it out. We generally settle on a single phone per car now, because it just isn't worth it.