Very interested in the 6682 "boosting" feature, too. If it's in there, seems it should be accessible. I also had the same lowered volume experience changing from the OEM faceplate to an aftermarket ... different design inside above the earpiece so the sound is lost. I put the OEM back on and it's OK, but still low, even on the highest setting. Great phone otherwise. I'll try chatting in the pit at a NASCAR event ... maybe that will boost it a bit! Any other tips/advice will be greatly appreciated. Tom in Ventura, CA