In the unlikely event that your BlackBerry refuses to load one day and simply displays an error message on the screen reading "Error 302 - Reload User Software", all is not lost. You can re-load the software from your PC using the BlackBerry Desktop Manager application.

The BDM can be downloaded free of charge from the BlackBerry web site here - http://na.blackberry.com/eng/services/desktop/

Install the software before connecting your device to the PC via the USB cable if you have not done so already. The main dashboard will be displayed:

Click on the link for the Application Loader

Click on the link to Update Software. The wizard will connect to the Internet and search for available updates for your device:

If no updates are available, click on the Options button:

The current applications on the device will be listed, click Next to simply reinstall the current configuration.
This process may take up to 30 minutes to complete, but once finished your device should be resurrected and functional again.

For BlackBerry device software updates, please visit the FTP Site