ive had my phone for about 3 months and its been awesome, i keep it in a agent 18 case and i have a skinsheilds cover ont he screen. I take good care of it and its onlybeen dropped once or twice from about 1 foot form the ground. the other day someone showed me how to turn my keyboard click off so i did and for some reason it turned off basically all the sounds on my phone. ther was no sound when i unlocked it and no sound when i shot photos. then i realized that when i switch from regular mode to silent mode it doesnt vibrate like it used to... has anyone had this problem? should i bring it back to apple?