One thing I have noticed on the Blackberries that I wonder if anyone else has noticed. No matter which headset I try, on my end as I increase volume past 1/3 it starts to have a hiss in the headset and it increases as the volume is cranked up. Doesn't matter which phone or headset. The other party doesn't hear it and I can still hear and understand the other party just fine. Just an annoyance but would tend to indicate that audio amplifiers in the BBs are not very high quality. Anyone else notice this?