This was the last major update for the BlackBerry 10 OS. It improved Android app runtime (though it is now obsolete due to Android APK changes), improved camera performance, and patched the "Year 2038" date bug that caused older devices to stop working if the date was set too far forward.
Official link download autoloader 10.3.3. - CrackBerry Forums
A Windows PC (7, 8, 10, or 11 – 64-bit), a reliable USB-A to micro-USB cable (data sync capable), and your Blackberry Z10 STL100-2 with at least 50% battery.
The most reliable links are hosted by the community at CrackBerry Forums .