I have a Plantronics Voyager Pro which I previously used with my touch pro 2. It was the best sounding ear piece I have ever used, callers voices sounded Cristal clear. Ever since I switched to my Evo callers voices have been less than good. Caller voice sounds muffled for whatever reason. I have tried two different voyager pro's and two different evo's, same result's. The only thing I have left to do is try another brand of bluetooth. If any body has any suggestion it would be greatly appreciated. Thanks in advance.