[2ksilverbullet]

Do you have the phone set to vibrate when it rings? The reason I ask, I went through something similar and discovered that you can set the vibrate levels in the same manner as the audio levels. I had managed to somehow turn mine all the way off. Hit the volume up/down buttons on the top left of the phone, when the level pops up, hit the center button on the screen (speaker), it should pop up the vibrate controls. Hope that helps.