Can't seem to figure out what it does.

It transfers contacts from your phone...

It transfers contacts from your phone...

DUH

That's what it's supposed to do - but in reality - it gives you no indication of HOW. It tells me simply to use my phone to transfer the contacts. The manual also gives no clue on how to do it.

It's amazing how little the administrators help on this site.

Sigh... If you want a serious answer post something more intellectual than "I can't figure it out".

If your phone is semi-modern (has a recent Bluetooth profile) and paired, the AVIC will pull contacts automatically on power up and during the initial pairing. If that's not happening, you can force a contact transfer with that button.

If your phone supports auto contact transfer, just hit the transfer button and then hit cancel on the business card screen, contacts transfer in the background.

If your phone doesn't support auto contact transfer, hit the transfer button (don't cancel the business card screen) and then send your contacts to the AVIC via your phone.