I have a T-Mobile MyTouch4G running Android V2.2 that I am trying to connect to the AVIC-Z120BT. From the head unit I run through registration sequence then enter 4-digit pass code on phone. Phone connects then asks if I want to allow head unit to import (read) phonebook entries. I enter "yes" or "ok". The phone connects for a few seconds, then immediately disconnnects with the message, "Disconnecting from headset". Why doesn't it stay connected? Any help is greatly appreciated. Of course, Pioneer says there is no problem with head unit and T-Mobile says phone works fine. Stinks!