I just added the GPS and Bluetooth modules to my AVH-P4200DVD. Only real problem is my wife's iPhone 4 (iOS 5.01) will not aut-connect via bluetooth. She must go into the phone's settings menu and enter the PIN to connect. EVERY TIME SHE STARTS THE CAR! My iPhone 4S will connect without me doing anything. Is there a fix so she doesn't need to reinitialize each time?

Same problem here with my android (nexus s) had no issues with my old iphone.