I have a brand new Blackberry 7100t that I couldn't get to work with my brand new June 2005 X5 3.0 with on board computer. Originally it paired and the car phone rang when the 7100t rang, but I could not get the car phone to pick up the call. So I called BMW who said that they had heard about the problem but there was no fix yet from T-Mobile or RIM because the "Bluetooth system was different in the phone from what is in the car."

So I called T-Mobile and to make a long story short they finally recommended that I try updating the 7100t's Firmware from version 3.8 to 4.0 (the new phones are just beginning to be shipped with 4.0, I bought mine last week and it didn't have 4.0). T-Mobile directed me to www.tmobile.com/bbupgrade and said that I first MUST download the new Blackberry desktop manager software THEN downlaod the upgrade to version 4.0 in order for it to work correctly.

I did all this and on my initial attempt to pair with the car I got a message that said "the phone could not be paired with the BMW." Just as I was about to smash the phone, I gave it one more try by doing the following:

*FIRST DELETE THE BMW##### FROM THE PAIRED DEVICES LIST IF IT"S ALREADY ON THE 7100t BUT NOT WORKING*

Then:

1) DISABLE Bluetooth in tools on the phone and turn the phone OFF.
2) Turn OFF the car and take they key out of the ignition.
3) Put the key back in and START the BMW.
4) Turn the phone ON and ENABLE Bluetooth on the tools menu.
5) Click the trackwheel on the phone and click on add device. You should see BMW#####...click on it.
6) Enter your Passkey
7) It should pair successfully, Then TURN OFF the car for a minute or so.
8) Start the car.
and YOU"RE DONE! If you have the same experience that I did you're 7100t now works automatically with the car.

However, the address book will not upload. That's still a compatability problem that hopefully RIM or T-Mobile will fix.

GOOD LUCK!!!!