| | Re: BBM Upgrade Problem
Try these steps in order. If the first doesn't work, go to the next, etc.
With the power on, remove the battery, wait at least 30 seconds, make sure you are in a location with good mobile signal, and then put the battery back. When the device boots up, try again.
Launch app world. Hold the alt key and type RST. After a few moments app world will close. Launch it again, and then try upgrading BBM again.
Delete BBM from the device using the device (i.e. from options). Do another batter pull as described above. Then reinstall BBM either from app world, or by pointing your BlackBerry browser to blackberry.com/messenger.