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Download the correct 10.3.3 autoloader .exe file to your Windows PC. Blackberry Z10 Stl100-3 Autoloader 10.3.3 Download
This indicates a mismatched firmware file. Double-check that you did not accidentally download an autoloader meant for the STL100-1 (Omap processor version). Download the correct Qualcomm file and flash again. The most reliable community-driven repository for OS links