Has anyone tried doing a factory reset? You have to think of your phone much like you think of a computer upgrading. You're computer has Windows Vista and you choose to UPGRADE to Windows 7 which is just putting the OS on the computer without wiping anything, much like your just putting JB on your phone. Anyone who is familiar with re-installing an OS on a computer is that there is a BIG difference between UPGRADING and RE-INSTALLING. Doing a Factory reset may get off any system files that may have been left behind and doing a factory reset will, well, reset them. If resetting your phone doesn't fix any problem the best thing you can do is that.