I have purchased every top of the line phone nextel has had since they begun there service years ago ie (98-99?) I1000, I2000, I95, I730, I830, I860, BB 7520. I have used the bluetooth adaptor on all of them except the blackberry 7520. Reception is fine up to about 25 feet away about 90% of the time. I dislike the fact that the adaptor does not let you use voice dial from your bt ear piece. I have the one from moto that doest have the fold down mic, but is using bt software 1.2. Far as the black berry, you dont need the adaptor. But it still does not allow you to use the voice activated feature. You have to make the call then select blue tooth from the phone and go from there. the whole purpose is to leave your phone somewhere safe, in car on charger, or at your desk charging, in suitcase...etc, and make and recieve calls without having to touch your phone. You can do this with other cell service provider phone's. I have not check out the new peice of crap nextel phone with bt yet. But my assumption is you cant. They need to catch up ASAP! They are a business man cellphone company. But money is money and if they want more they need to catch up. My two cents!