Definitely not a general BT problem with Curves. I have an 8300, and the BT is probably the best I've had out of several BT phones. I've used it with a couple of Moto HS850's, a Cardo Scala 500 and Jawbone -- all with excellent results. I personally find the Jawbone uncomfortable and floppy on the ear, but the BT connection between it and the Curve is spectacular - volume, clarity, noise suppression and voice recognition. Definitely not a general Curve BT issue. Like the others here, I suspect it's a problem with UMA/WiFi conflicting with BT, or a problem unique to your device. Definitely follow up with T-Mo.