i just got a new droid today. i'm not a big fan of ringtones, so i always set my phone to vibrate. i noticed when i set my phone to vibrate by using the volume control on the side of the phone, the phone itself would vibrate when i set it to vibrate mode. now it doesn't vibrate anymore and it doesn't vibrate either when i get any calls. is it because the vibrate function broke or something? also, i don't know if this plays into it, but the battery cover of my phone was really tight, so it was quite difficult for me to pull it off... i ended up pushing pretty hard to pull the cover up and the hinge went up a bit and really hurt my thumb. would this have any say in why the vibration doesn't work anymore?