I use a Jawbone (the original, not the Jawbone II) with my AT&T 8310. It works great! All types of noise are cancelled out very well, with the exception of wind noise (The Jawbone II is reported to be better at that.) The speaker sounded tinny at first, but once I turned the volume up, the sound is great, and I don't have to jam it in my ear like some other BT units. I find it to be extremely comfortable. I hardly notice the fact that the Jawbone is touching my cheek, and I can wear my Jawbone and sunglasses at the same time with no problem.