Samsung Exynos devices handle FRP differently. Qualcomm chips have a dedicated (901D) that allows low-level commands. QSFTool exploits this port to generate the link, which is why it doesn’t work on most Exynos models.
The QSF Tool typically operates by exploiting the or specific diagnostic ports inherent to Qualcomm chipsets.
A stable connection is critical to avoid "bricking" the device. Step-by-Step Guide to Using QSF Tool
Disable driver signature enforcement on Windows (Shift + Restart → Troubleshoot → Startup Settings → Disable driver signature enforcement). Then install the Qualcomm drivers. After that, extract QSF Tool to a folder (do not run from within the zip).