I have a Razr, not a Krzr, and Bluetooth works great. I would expect Motorola to provide similar, if not identical, Bluetooth features on these 2 models. I don't store that many numbers, so I typically use the Dial By Number method, which works well. The only thing I have a problem with is selecting numeric response options such as dialing extensions, or providing a PIN. I end up picking up the phone and punching those in. I haven't tried pressing the Talk button and saying them. Does that work?