My Blackberry has the same problem! With my research, I've found that it can mean one of two things; 1. Your operating system (OS) is no good and needs to be reinstalled. 2. You have the wrong kind of battery. OR B. Your battery is not connecting with the prongs correctly. To fix 2B is simple. Place a piece of paper folded a few times between the top edge of the battery and the phone to push it towards the prongs. To fix 2 is also simple. Purchase the right kind of battery. To fix 1 is a bit more complicated. But here it is. 1) Plug in your blackberry to your computer without it's battery. Also, remove the SD card. 2) Open the Blackberry Desktop Manager --If it says your device is not connected or you cannot find your device; (Sometimes Your Blackberry wont be recognized. If this is the problem, a pop-up window will pop-up and say something along the lines of; "The BlackBerry Desktop Software cannot connect with this device. This device is rebooting or has a dead battery. Click Retry to attempt to...