I had the original HS655, and had exactly the issue you're talking about. I just got a new Plantronics 925 a few days ago, and so far am loving it. The reports from callers who had listened to me often on the HS655 are that I sound much better and clearer, with less background noise with the 925, even when in noisy environments. I'd recommend it as a good replacement for your 655, as its been for mine.