My X5 did a crazy thing today - it paired with my iPhone and my Curve! I pulled into the driveway and before I shut her off, I accidently pressed the button to activate the phone. When I saw the message in the display, I thought "what the hell" and gave it a try. I checked my phone and the BMW showed up! I found the PK card, typed it in and it downloaded my address book! SUCCESS!
I got out and grabbed the curve from inside the house and it failed to see the car. I gave up because I had to make a quick trip and take my daughter to the store but while she was inside, I tried again and it worked this time! SUCCESS!
I still can't figure out why it took dozens of tries to get them to pair. The ONLY thing I can think of is that both times I was successful I had my seatbelt on! If I can come up with a third phone to try, I'll test this theory. I will not risk removing one of my already paired phones.