Disconnect the phone. Press and hold the Power + Volume Down buttons for 15 seconds to force a complete internal hardware reset. Retry the Volume Up + Volume Down connection sequence using a different USB port. Error 3: Constant Connecting and Disconnecting Chime
for the explicit entry: Qualcomm HS-USB QDLoader 9008 (COMxx) .
Driver issues arise for several specific reasons. A core reason is that Windows 10 and 11 require kernel-mode drivers to be digitally signed by Microsoft. Unauthorized or older 9008 drivers can fail this check and be blocked. Windows’ Plug and Play (PnP) system can fail to automatically assign the 9008 driver even after installation, leaving the device listed as an "Unknown Device". This is often due to outdated driver caches or previous driver installations that conflict with the new one. Additionally, a faulty cable that only supports charging or a low-powered USB port can cause intermittent detection, which may appear as a driver problem but is actually a power delivery issue.
Select (if it asks for device type) or Show All Devices -> Next. Click Have Disk .
A common reason the driver drops or fails to initialize is that the device has timed out or exited EDL mode. Ensure the phone is accurately locked into the 9008 state before checking the driver status. Method 1: Hardware Key Combination Power down the Oppo or Vivo smartphone completely. oppo vivo usb driver fix 9008
Since the working 9008 drivers are not digitally signed, Windows will automatically reject them.
Go to > Advanced options > Startup Settings > Restart . Press F7 to select "Disable driver signature enforcement." Phase 2: Installing the Qualcomm USB Driver Fix
Hold down the key while clicking Restart in the Windows Start Menu.
Choose the Qualcomm_USB_Driver_x86.zip setup. Disconnect the phone
The driver is the essential software link that allows your computer to communicate with an Oppo or Vivo smartphone when it is completely bricked, stuck in a bootloop, or completely unresponsive. This state is known as Emergency Download Mode (EDL Mode).
If you have previously attempted to install these drivers, conflicting versions may be blocking the connection. Follow this clean installation workflow: Uninstall Existing Drivers
Before diving into solutions, it helps to understand what 9008 mode is and why it causes so many driver problems. When an OPPO or Vivo phone enters EDL mode, it operates at the chip level, bypassing the normal boot process. In this state, the phone presents itself to the computer not as a standard Android device but as a "Qualcomm HS-USB QDLoader 9008" port. This is the signature identifier of a device ready for firmware download.
If you are seeing "Qualcomm HS-USB QDLoader 9008" in Device Manager with a yellow exclamation mark, follow these steps. Step 1: Install the Driver Setup Download the . Run the installer as an administrator. Error 3: Constant Connecting and Disconnecting Chime for
OPPO's own "PC Suite" driver often overrides the Qualcomm driver. Uninstall "OPPO PC Suite" and "MTK USB Port" from Control Panel before retrying the Zadig method.
Fixing Oppo and Vivo USB driver issues, specifically Error 9008, can be a frustrating experience. However, by following these step-by-step solutions, you should be able to resolve the issue and reconnect your device to your computer. Remember to always use official drivers or reputable third-party tools to avoid any potential risks. If you're still experiencing issues, feel free to share your concerns in the comments below, and we'll do our best to help.
Now that your 9008 driver is stable, you can flash the stock firmware.