Here’s a useful piece of information regarding the QUSB Bulk CID driver – commonly encountered when working with Qualcomm HS-USB diagnostics or emergency download (EDL) mode:
The presence of this driver has security relevance: qusb bulk cid driver
| OS | Driver File(s) | Installation Method |
|----|----------------|----------------------|
| Windows | qusb_bulk_cid.inf, qusb_bulk_cid.sys (or integrated into QDLoader driver) | Zadig (replace WinUSB), or manually via Device Manager |
| Linux | No specific driver required – uses usb-storage or libusb + custom tool (e.g., edl by bkerler) | modprobe usb-storage or access via libusb with udev rules |
| macOS | Not native – uses libusb via Homebrew tools | Virtual machine or cross-platform Python scripts | Here’s a useful piece of information regarding the
Probe function:
The screen is black, and the device does not respond to buttons. On Google Pixel 3/4 series, this is often a "natural lifecycle" failure of the memory. Intentional Flash: You are trying to manually flash firmware using tools like TFT Unlock Qualcomm PCAT 2. Required Driver: Qualcomm HS-USB QDLoader 9008 On Google Pixel 3/4 series, this is often
Windows often fails to "see" the driver automatically. You’ll need to point it in the right direction: Device Manager (Right-click Start > Device Manager). QHSUSB_BULK under "Other Devices." Right-click it and select Update Driver Browse my computer for drivers
Disable Driver Signature Verification: On Windows 10 or 11, you may need to disable integrity checks so Windows will accept the unofficial or older Qualcomm drivers.
CID: 150100424A58345248015B83D3F15096
MID: 0x15 (Samsung)
PNM: "BJX4RH" (Product name)
PSN: 0x015B83D3
MDT: 09/2015