Can anyone tell me how to pair a model MA712LL iPhone with a 2006 650i ? I recently updated the phone with Version 1.1.4 (4A102)

I had it working with my previous phone ... a Samsung using Sprint service.

The iPhone will detect the car and asks for a PIN. With the Samsung it seemed that I had entered 0000 and it completed the pairing. Doesn't seem to work the same way with the iPhone.

Can anyone tell me where to find the PIN? How many digits is in the PIN?

You can use whatever PIN you want. each BT device has it's own unique ID.