BlackBerry 10 firmware is strictly bundled by hardware ID. You must use software explicitly designated for the Q5 (SQR100-1/2/3/4 series), with SQR100-2 often sharing identical core OS pools with other Q5 variants but requiring matching radio files.
This signifies a corrupted flash or a mismatched firmware version. Ensure you downloaded the exact firmware file matching the SQR100-2 variant and re-run the process. If you need help with the next steps, tell me: What current OS version is your Q5 running? blackberry q5 sqr100-2 firmware
If the downloaded firmware is zipped, extract it using a program like 7-Zip or WinRAR. BlackBerry 10 firmware is strictly bundled by hardware ID
Locate the downloaded .exe Autoloader file on your PC. Right-click it and select . A black command prompt window will open displaying the text: Connecting to Bootrom . Ensure you downloaded the exact firmware file matching