The driver did not install correctly. Right-click QUSB_BULK , select Update Driver > Browse my computer for drivers > Let me pick from a list , choose Ports , select Qualcomm Incorporated , and manually force-assign the Qualcomm HS-USB QDLoader 9008 driver.
The phone is stuck in a diagnostic loop instead of entering the download state.
Look for a device labeled exactly as: (where "xx" represents a variable port number like COM3 or COM10).
Select > Qualcomm Incorporated > Qualcomm HS-USB QDLoader 9008 . Phase 3: Troubleshooting Common Connection Issues oppo vivo usb driver fix 9008
Have you disabled driver signatures?I can help you narrow down the issue.
If the driver is not installed or corrupted, the Windows Device Manager will show: Unknown Device
If your phone still appears with a yellow exclamation mark under "Unknown Device," you must force Windows to map the driver file. The driver did not install correctly
Once you’ve fixed the driver, protect against recurrence:
Fin.
If you are trying to unbrick, flash, or bypass the FRP (Factory Reset Protection) on an Oppo or Vivo smartphone, you are likely familiar with , also known as Qualcomm HS-USB QDLoader 9008 . When a Qualcomm-powered device enters this mode, it often fails to connect to the computer properly, showing up as an unknown device, "QUSB_BULK," or a malfunctioning driver in the Device Manager. Look for a device labeled exactly as: (where
Remove the back cover of the phone and unscrew the protective motherboard shielding.
[Bricked / Locked Oppo/Vivo Phone] │ (Physical Connection via USB) ▼ [Windows PC] ───► (Needs Qualcomm 9008 Driver) ───► [Recognized as COM Port] ───► [Flashing Software]
Find (under Ports or Other Devices) with the yellow warning sign. Right-click it and select Update driver . Choose Browse my computer for driver software .
Leave your exact OPPO or Vivo model number (e.g., CPH2205, V2025) and your Windows version in the comments. We’ll provide tailored INF edits or test point locations.
However, for the 9008 port to work, your Windows PC must recognize the device with the correct . If the driver is missing, corrupted, or conflicts with existing USB drivers, Windows may show “Unknown USB Device” , “QHSUSB_BULK” , or no reaction at all.