[cenozoite]

Ya, I was just reading those forums myself and saw mention of plenty of bluetooth related issues, but none relating to up-and-down volume fluctuation. It makes headsets completely unusable. I'm willing to go out and buy a new headset that works without this issue, but only if I'm sure that will be the case. Cortez reports the Z9 working fine, but it's possible he simply hasn't noticed this yet. It did take me a few longer calls on automated lines before it became obvious - I just thought people were varying their own speaking volume before. But now that I know it's a technical problem, I can't ignore it if I try.