I actually have a 23 page article from JHP on how to install the two Holden bluetooth phone buttons on the center console, wire them to light up and work and then get to operate with some aftermarket bluetooth kits. I used a Nokia kit but the instructions are for a Sony I believe. I would be happy to scan them if it would help you
Single button, plug and play. It really is amazing how seamlessly it integrates with the factory stereo. On Android, you push the phone button and voice recognition lets you dial a contact using your 15 year old radio.