I had seen postings elsewhere on the internet that the Blackberry 7100 was not compatible with the BMW bluetooth kit. I wanted to report that mine works very well. I have a 2004 X5 and had the bluetooth module added by my dealer (BMW San Francisco), replacing the assist module. The dealer was pretty clueless about adding it - it took two trips there for them to get it working. However now that it works the phone pairs up and makes incoming/outgoing calls very well. Address book sync and SMS do not work.