What kind of range are you getting?
BlueTooth range varies a lot by manufacturer of the headset, and there are other factors that can influence range... I have a 4-5 year old
Plantronics Voyager 510 that I use with my Rezound, usable range is about 25-30 feet from the Rezound, which was about the same with my LG enV Touch, Samsung Stratosphere, and HTC Incredible 2 with the same exact headset.
I could be way off on this, but if memory serves me correctly, there is a high and low power implementation of BT for audio (headset) devices, the range is a huge jump between the two.