ok guys I have the Alltel ppc6800. I have in call volume issues as well!! I have checked everywhere for this file and cant seem to find it??? I am using Resco. Running WM6. This is the only thing I havent tried yet to get the volume up. I did the change values in the registry files but still doesnt seem to have much affect on the incall volume!!! So I figured I would try this. Can any one else with the Alltel ppc6800 confirm this works? Can someone point me in the right direction where this file is please?? Thanks inadvance for any replies!!