I'm not interest in a Ford, never had one. In my search this did turn up. Apparently, Ford Sync does allow multiple phones to be connected and then to select the one you want to use, even if both phones are in the vehicle and on. This leads me to think that this is a production issue, i.e. what BMW has.
https://www.5starford.com/blog-tuesd...nes-with-sync/
I have enough info now and will try this out. Thanks for your help.