Pete,
You have my deeply respect for your expertise. A fine how to. Couldn't do it better. I wasn't aware of the telephone function in the high-line SATNAV. But maybe it isn't possible anyway in the Mrs car, because I retrofitted it from low-line to high line with a BM24 radio and a 4:3 screen.
I fixed the bluetooth undependently with a mirror of Seecode:
But I don't have a thelephone mute or menu on my screen. The Seecode however has a mic and speaker build in + numbre display while rearview is not disturbed. Also it can operate wireless with a battery for almost 4 months (if not constantly used) Further options like memory for last chosen numbre and indicators for telephone use are installed.
I defenitly will try your option too as an application on this system. the Mrs. wouldn't mind I think.
Again thanks for your great thread!
Regards Ralph