This specific driver package, sometimes referred to as the or 9008 (QDLoader) , enables your computer to interface with the phone’s baseband processor. It is primarily used for:

Android Diagnostic Mode - How to Enable it? - Stack Overflow

The is a critical software component for Windows users who need to communicate with Android devices in Diagnostic (DIAG) mode . Often bundled with the QPST Tool or QFIL , this driver allows your PC to recognize a connected Qualcomm-based smartphone as a virtual COM port for advanced servicing. What is the Qualcomm Diag Loader 2016 Driver?