Got it to work,
Here is how I am using a DROID2 and a DROIDX.
PAir using search button on HU. (Took long time to get it correctly paired).
If you keep in map mode, the blutooth would connect on whichever phone is first in the car.
There are two catches.
1. Do not manually disconnect the bluetooth pairing.
2. Keep unit in MAP mode.
Just tested seem to be working.
Woudl update if I see any issues. For now it seems to be working