If your device appears as "QUSB_BULK" in Device Manager with a yellow exclamation mark, follow these manual steps:
Allows the PC to use the connected Qualcomm device as a cellular modem for internet tethering. qualcomm usb driver v1.0.exe
Crucial for unbricking devices, the driver recognizes the hardware as "Qualcomm HS-USB QDLoader 9008" when in this low-level state. If your device appears as "QUSB_BULK" in Device