This allows you to install the correct test-signed drivers.
Old ADB or serial drivers can hijack the 9008 port.
Once you fix your OPPO or Vivo, take these steps to never need this guide again:
Last Updated: [Current Date] Difficulty Level: Intermediate (Windows PC Required) Target Devices: All OPPO (Find, Reno, A, F, K series) and Vivo (Y, V, X, T series) with Qualcomm Snapdragon processors.
If you are reading this, your OPPO or Vivo smartphone is likely bricked. The screen is black, it won't charge, and when you plug it into your computer, it shows up as QHSUSB_BULK or simply Qualcomm 9008. You have found the right article.
The "9008" port (formally known as Qualcomm HS-USB QDLoader 9008) is the emergency download mode for Qualcomm chipsets. It is the last line of defense for a dead phone. However, Windows 10 and 11 often refuse to recognize these devices correctly, displaying the dreaded "Device Descriptor Request Failed" or a yellow exclamation mark in Device Manager.
This 3,000-word guide will walk you through every single step to force-install the correct OPPO/Vivo USB drivers, fix the 9008 error, and get your phone ready for flashing.
Try a different PC with Windows 7. Older Oppo/Vivo chipsets (SDM439, MT6765) hate Windows 11's driver enforcement. A cheap Windows 7 laptop will fix 90% of 9008 driver errors instantly. oppo vivo usb driver fix 9008
Have you successfully flashed your Oppo/Vivo? Let me know which model in the comments below!
Follow these steps sequentially. Do not skip any.
To fix the Qualcomm HS-USB QDLoader 9008 driver for Oppo and Vivo devices, you primarily need to resolve "yellow exclamation mark" errors in Device Manager which usually stem from Windows blocking unsigned drivers. 1. Fix Driver Recognition (Yellow Exclamation Mark)
If your device shows as "QHSUSB_BULK" or has a yellow warning icon, you must disable Driver Signature Enforcement on Windows. Command Prompt as Administrator. Type the following commands: bcdedit.exe -set loadoptions DDISABLE_INTEGRITY_CHECKS bcdedit.exe -set TESTSIGNING ON your computer.
After restarting, the warning icon should disappear, and the device should be correctly recognized as Qualcomm HS-USB QDLoader 9008 (COMX) 2. Manual Driver Installation If the driver is missing or not automatically assigned: the Qualcomm 9008 drivers from a reliable source like Driver Scape or official device support pages. Device Manager
and right-click the problematic device (often listed as "QHSUSB_BULK" or under "Other devices"). Update driver Browse my computer for drivers Let me pick from a list of available drivers on my computer and navigate to your unzipped driver folder. Select the Qualcomm HS-USB QDLoader 9008 and click Next. If a security prompt appears, select Install this driver software anyway OnePlus Community 3. Entering 9008 (EDL) Mode If your PC doesn't see the device at all, ensure it is in
: For many Oppo/Vivo phones, power off the device, then hold Volume Up + Volume Down simultaneously while plugging in the USB cable. Command Line : If the phone is semi-functional, use the command adb reboot edl Summary of Quick Links Qualcomm 9008 Drivers (Driver Scape) Official Support Microsoft Driver Update Guide Are you encountering a specific error code This allows you to install the correct test-signed drivers
(like Code 10 or 43) in Device Manager while trying to connect your device?
To fix the Qualcomm HS-USB QDLoader 9008 driver issue on Oppo and Vivo devices (often seen as a yellow exclamation mark or "Unknown Device" in Device Manager), follow these verified steps to ensure a proper connection for flashing or unbricking. 1. Disable Driver Signature Enforcement
Windows often blocks these drivers because they lack a digital signature it recognizes. This is the most common cause of the Code 52 error. Click Start, hold the Shift key, and select Restart.
Navigate to Troubleshoot > Advanced options > Startup Settings > Restart.
After the reboot, press 7 or F7 to "Disable driver signature enforcement." 2. Install the Proper Drivers Ensure you are using the official Qualcomm QDLoader 9008 drivers rather than generic mobile drivers. Download: Search for " Qualcomm HS-USB QDLoader 9008 Driver " for your specific OS architecture (x64 or x86).
Installation: Run the .exe as an administrator. Choose "Free Build" if prompted during the setup.
Manual Update: If the device still shows a yellow exclamation mark: Open Device Manager. Right-click the 9008 device under Ports (COM & LPT). Right-click → Uninstall device and check “Delete driver
Select Update driver > Browse my computer for drivers > Let me pick from a list. Qualcomm HS-USB QDLoader 9008 " and click Next. 3. Verify Connection (EDL Mode)
The device must be in Emergency Download (EDL) Mode for the 9008 port to appear.
Hardware Method: Power off the phone. Hold Volume Up + Volume Down and connect it to your PC via a high-quality USB cable.
Check Output: In Device Manager, it should appear clearly as Qualcomm HS-USB QDLoader 9008 (COMX) without any warning symbols. 4. Common Fixes for Persistence
LibUsb Filter Error: If using tools like UnlockTool and getting errors, you may need to uninstall "libusb-win32" filters that interfere with the Qualcomm port.
Cable/Port: 9008 mode is extremely sensitive. Use the original USB cable and a USB 2.0 port on your PC (avoid USB 3.0/blue ports if possible).
Are you currently seeing a specific error code (like Code 10 or 43) in your Device Manager, or is the device not showing up at all?
Download Zadig (open-source USB driver installer).