Originally Posted by UCrewX5

The 2005 combo Assist/BT module is made by Motorola and should have no problems pairing with the V3 whatsoever. You can have up to 4 phones paired to the vehicle. It's a FIFO (first in first out) setup, so when a 5th phone is paired then the 1st one that was originally paired is dropped off. To my knowledge there is no way to delete (or "unpair") the phone from a car with the Motorola module.

The phone configuration / pairing is independent from the key profile and should have no bearing on this.

I assume the V600 is still working fine, correct? If so, I would suspect that there is either a problem with the V3's bluetooth configuration or even a problem with the phone itself. If possible, try getting your hands on another V3 and see if it experiences the same problem.