Have you guys tried to pair your current cell phones to the bluetooth system without the use of the BMW phone ?
Since your X5's already came with the BMW phone, not sure if it will work, but it's worth a try.....
I have my iPhone connected this way. You will just need your Pairing Code to get it working.
Good Luck !!!
In the stable.....
2006 X5 4.4i
2008 Yukon XL Denali - Family Taxi & Trailer Hauler...
2006 CBR 660RR - Track Toy
2007 Yamaha Warrior Midnight - The beast
Formers: 2002 330ci (Sold)