BlueAnt devices in my experience do not pair well with Motorola and really aren't a good BT company.
Plantronics is the best IMHO after using Moto, Blue Ant's and quite a few Plantronics.
Check out Blueant's website.
I had the z9i and to pair that you just held the big silver button that had the ant on it until it was flashing blue and red.
then you have the phone search for devices....