I recently had discovered that my new RAZR Maxx was not ringing for incoming calls. Then i noticed that the speakerphone had no sound, alerts weren't sounding, etc..After verifying everything was enabled in the sound settings, I decided to reset to factory defaults to rule out an app causing the issue, and presto...sound started working, Then 1 week later, same issue. Turns out I found several other folks in forums having the same issue and it appears to be a hardware problem. If you rub back and forth just below the speaker on the back side of the phone on the kevlar backing, the sound will return. You have to apply a little pressure, but to my amazement the sound returned. I've had to this twice in the past week and both times this fixed it, so i hope this will help you if your having the same problem. I called Verizon and they are shipping out a replacement which i'm hoping does not have the same feature.