I just got the Droid X. I installed a handful of free apps and chose a factory ringtone. The phone was working fine for a while, but suddenly has just stopped ringing. I have turned the system volume to loudest setting. I have used the side toggle bars as well. Silent mode is "OFF". Sound is "ON" on the menu before shut down. I have turned it off, re-selected ringtones and reset. Please help. I am missing very important phone calls. My phone vibrates only. Also, ALL of my other audible notifications work fine. Email, text, etc... all ring with the factory setting I chose.