Right-click the entry in and select Update driver .
: Qualcomm diagnostic interfaces struggle with USB 3.0 or USB-C ports on newer motherboards. Plug your cable into a native USB 2.0 port (usually black, not blue).
This article will explain exactly what the QUSB_BULK_CID driver is, why your device might be stuck in this mode, and provide a detailed step-by-step guide to rescue it.
The name itself breaks down its function: qusb bulk cid driver
: Unzip the folder to an easy-to-find location, like your Desktop. Update via Device Manager Device Manager
: If successful, the entry will move to the "Ports (COM & LPT)" section in Device Manager. Troubleshooting the "Hard Brick"
The "QUSB_BULK_CID" driver is part of a family of related Qualcomm USB identifiers: Right-click the entry in and select Update driver
It allows tools like the MSM Download Tool or Qualcomm Flash Image Loader (QFIL) to rewrite the device's software. How to Install the Driver
This driver is essential for advanced mobile device recovery, allowing users to "unbrick" smartphones that no longer boot into their standard operating systems. What is the QUSB Bulk CID Driver?
Select the qcser.inf (or qcser.cat depending on version) file. This article will explain exactly what the QUSB_BULK_CID
Extract the downloaded .zip or .rar archive using a tool like 7-Zip or WinRAR.
Once the correct driver is installed and your PC sees the "Qualcomm HS-USB QDLoader 9008," you can attempt to recover the device.
Choose and then "Let me pick from a list of available drivers on my computer."
Ensure that for retail production devices, the blowing of fuses (such as the Qualcomm SECURE_BOOT fuse) restricts the capabilities of the QUSB Bulk interface, preventing unauthorized reading of the CID or memory dumps via generic bulk commands.