Ive looked through several pages on bluetooth search, however no definitive answer. I just purchased an '11 escalade and no phone will recognize the truck. Dealer was no help, just gave pairing instructions. No previous phones are connected. I really do not want to go with aftermarket head unit, unless absolutely the last option. I have found the interface units from PAC, however they say for replacement of factory head unit. In everyone's experience, what is need to make the factory BT work with Apple and Android phones?