Just thought I'd bring this post back. I'm new to the forums and was wondering what the deal was with this. I have an 05 EB with the nav system and was curious about the same thing. I looked in the owners manual and after reading a little while found this description, which I thought was rather funny and odd at the same time...
12.
Phone (if equipped): If the phone button is pressed, the display will read NO PHONE. This button is non-functional (the radio will not mute). Cellular connectivity is not currently available for this radio.
So how bogus is that. They have a button there, but it doesn't do anything?? That to me is just plain stupid. So now my question is did this feature get added on the later Expeditions and then worked?? I'd be curious if I could then transfer a later model nav system from like say an 07 or 08 into my 05 and have it directly plug in and work perfectly. Assuming now the current radio has the capability of 'cellular connectivity'
