10.3.3.3216 (Final official release) or 10.3.2.2876 (Known for slightly better performance and Android runtime compatibility).
If your phone falls into any of the above categories, stop trying to open settings or connect to Wi-Fi. You are now a candidate for the autoloader.
Use a high-quality, reliable Micro-USB cable connected directly to a motherboard USB port (avoid external USB hubs). Step-by-Step Installation Guide blackberry stl100-2 autoloader
The phone will reboot automatically several times. Once the screen shows the initial setup language selection, the autoloader is done. Troubleshooting Autoloader Issues
To use a radio‑only autoloader:
By following the information provided in this article, users can unlock the power of the BlackBerry STL100-2 Autoloader and take their BlackBerry device to the next level. Whether you're looking to update your device software, repair a damaged device, or customize your device, the Autoloader tool is a must-have for any BlackBerry device owner.
: Install BlackBerry Link or the standalone BlackBerry USB drivers on your PC so the computer recognizes the phone. repair a damaged device
[Guide] How to Load an OS Using Autoloader. - CrackBerry Forums
After using the autoloader, you must understand the current state of BB10: or customize your device