Success with Pioneer DEH-P65BT
I just bought a Pioneer DEH-P65BT and I had Pairing issues with my iPhone 3G yet my Sony TMR-B9iP A2DP transmitter would instantly pair without any intervention.
I managed to solve the iPhone 3G problem by Registering Phone to a Blank "NO DATA" slot of P2 or P3, NOT P1 which is manual only.
Go TELEPHONE -> FUNCTION -> Press Center -> Rotate to SET PHONE -> Push UP or DOWN for "P2 NO DATA" -> Press Center for "REG COMPLETED". :thumbup:
With Pioneer TELEPHONE FUNCTION "AUTO CONNECT: ON" my iPhone 3G always connects to my Pioneer Deck as soon as it has power and my iPhone is in Bluetooth range. I soon see my Signal strength and Battery level show on Ignition On or Accessory Power on, even if the Pioneer Deck is set for Tuner Audio Source etc!
If the Pioneer was last left in BT AUDIO mode and I have my Sony TMR-BT8iP adapter in, the iPhone 3G releases Pause and plays current Podcast or Song - whatever mode the iPhone itself, was last left in.
From the Pioneer Deck or Remote, I can choose Next Song, Previous Song etc using the MULTI-Control Right or Left nudges.
I also found the Kensington 4-IN-1 iPod 12v adapter excellent as the USB iPod cable is a piggy-back pass-through that allows me to Connect the Sony TMR-BT8iP A2DP adapter into the charging cable at the same time. I can the charge my iPhone 3G and also transmit Bluetooth A2DP to the Pioneer Deck on longer trips. Note, the Kensington 4-IN-1 12v Charger cable works with iTunes (v8.0.1 at least) doing all the normal Sync stuff as well - Not just power-charging via USB!