The beauty of the Autoloader lies in its simplicity. Once the correct version for the 9900 (often OS 7.1.0.1098 or similar) is downloaded, the process generally involves: Connecting the BlackBerry to a PC via USB. Running the Autoloader .exe as an administrator.
Choose the system components and languages you want to install. to start the process. Do Blackberry 9900 Autoloader Flash File
If you have the "507" error, a Security Wipe is impossible because there is no OS to boot into. You use an autoloader. The beauty of the Autoloader lies in its simplicity
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