I sorta have a similar problem as the OP. I just received my sda compact from ebay, "as-is" and the speakerphone works but the actual earpiece speaker doesn't work. Just recently I noticed that if i make a call and use the sidekey volume slider it will make a been and for a fraction of a second I can hear the person on the other end. any suggestions? or advice
This is the *exact* problem I am having, did you ever get to the bottom of it?