Certain older developer versions of the 10.3.1 autoloader were used to bypass BlackBerry Anti-Theft protection before updating back to the latest OS.
: Community-managed repositories like the BlackBerry 10 Autoloaders collection often host these files. Blackberry Leap Str100-1 Autoloader Download
An autoloader is an automated "last resort" troubleshooting system that reinstalls the entire Operating System (OS) from scratch, similar to formatting a PC. For the BlackBerry Leap, it includes the OS files, radio firmware, and the executable loading application. Performance & User Experience Certain older developer versions of the 10