Just spoke to a "Khammi" at Pioneer mobile support, he stated that in order for a phone to be compatable with the avic-z1, it MUST have the following..
Need to have a phone with a Generic Access Profile (GAC)
AND
Head Set Profile (HSP) or Hands Free Profile (HFP)
I then asked him for a list of compatable phones, he gave a list as of 3 months ago....
Nokia: I870, 6230, 6230I (with bluetooth version 1.1), 6310, 6310I, 6600, 6620, 6630, 6650, 6651, 6680, 6670, 6820A, 7610, 6670B, 8800, 890I, 9500, N90-1
Samsung: D500, D508, D500C, D500E, D600, E750, E760
Sanyo: None