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Press and hold the Alt key . Press and hold the Right Shift key. Press and hold the Backspace/Delete key. Wait for the BlackBerry to reset.
This method will reset your BlackBerry without having to remove the battery. You cannot perform this method if your BlackBerry does not have a keyboard. Continue to hold the Alt key while you hold the Shift key. Make sure you are continuing to hold the Alt and Shift keys while you hold the Backspace/Delete key. When this happens, you will see the screen turn off. You can now release the keys. It may take a few minutes or more for the smartphone to return to its normal settings.