Need to get back a default software/application but how?

Resetting the BlackBerry device is a useful way to resolve issues and is usually the first step in troubleshooting the BlackBerry device. Knowing the differences between a hard, soft, double-soft, and master reset ensures that the correct troubleshooting method has been chosen. Note: Backup all applications before resetting the BlackBerry device using the Backup and Restore tool on the BlackBerry Desktop Manager.

Please follow the below steps or resetting

Performing a SOFT reset on the BlackBerry device Performing a soft reset stops all applications on the BlackBerry device by pressing the ALT+RIGHT SHIFT(CAP)+DELETE keys. A soft reset re-establishes communication between the BlackBerry device and the computer.
Note: This does not apply to the BlackBerry® Pearl™ smartphone.
Performing a DOUBLE-SOFT reset on the BlackBerry device Performing a double-soft reset stops all applications on the BlackBerry device and is nearly the equivalent of a hard reset. Timing however is critical. Perform a soft reset by pressing the ALT+RIGHT SHIFT(CAP)+DELETE keys. The screen will go blank. When the screen is no longer black, press the ALT+RIGHT SHIFT(CAP)+DELETE keys again. You should then see another blank screen followed by an hour glass.
Note: This does not apply to the BlackBerry® Pearl™ smartphone.

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