The acronym "CID" in this driver context is the most distinct variable. It usually points to one of two technologies depending on the specific kernel version:
: Attempting to unlock or flash a custom bootloader is a high-risk procedure. If the wrong image is flashed or the process is interrupted, the bootloader can be corrupted, forcing the chip into EDL.
While you can find "Qualcomm HS-USB QDLoader 9008" drivers to make the device "recognizable" to a PC, this rarely helps a standard user because:
To resolve a missing QUSB Bulk CID driver error in Windows, follow these structured installation steps. Step 1: Disable Driver Signature Enforcement (Recommended)
: On Windows 10 or 11, you may need to disable integrity checks so Windows will accept the unofficial or older Qualcomm drivers.
If the driver repeatedly rolls back to the QUSB Bulk state after a reboot, Windows is likely overwriting it with a generic driver. Disconnect your internet connection temporarily.
You can verify this by opening a terminal and using the dmesg command after connecting your device. The output will look similar to:
: If you see this, your device is likely a "paperweight" unless it is still under warranty. You should contact the manufacturer or a professional repair center rather than searching for a driver to "fix" it.
Essentially, your phone is "bricked," and it's waiting for you to send it the correct firmware files to bring it back to life. To do that, your computer needs to recognize it correctly as a Qualcomm HS-USB QDLoader 9008 Step 1: Download the Correct Drivers
EDL mode can also be triggered intentionally or by other software issues. It is a crucial tool for advanced users who need to unbrick a device, recover data, or flash low-level firmware. It can be entered by pressing specific button combinations (e.g., Volume Up + Volume Down while connecting USB) or using commands like adb reboot edl , but a failed OTA update or a corrupted bootloader can force the device into this mode involuntarily.
What (e.g., QFIL, Mi Flash Tool, QPST) are you planning to use with this driver?
When a Qualcomm device is connected to a PC in its standard operating mode, it uses standard Android Debug Bridge (ADB) or Media Transfer Protocol (MTP) drivers. However, when the device enters a specialized diagnostic or bootloader state, the system requests a different set of instructions. : Stands for Qualcomm USB.
To resolve the "QUSB_BULK" error and proceed with repairs, follow these steps:
| Tool | Purpose | |------|---------| | lsusb (Linux) | Confirm VID= 05C6 (Qualcomm), PID= 9008 (EDL) | | edl.py (Python) | Direct bulk read/write, no driver needed on Linux/macOS | | QFIL | Needs QDLoader driver, works with QUSB_BULK_CID after proper driver binding | | libusb bulk transfer | Custom scripts – send Sahara/firehose packets |
.inf file (often found in a "Qualcomm" or "QDLoader" subfolder). Choose from the list and click Next .