If you are still stuck, boot into a Linux Live USB (Ubuntu). Linux has no driver signing. The 9008 device will appear as /dev/ttyUSB0 instantly without any drivers. Flash using qmibox on Linux – it is 100% reliable for OPPO and Vivo bricks.
If your device is stuck in a bootloop or you are trying to flash a stock ROM, but your PC makes the "device disconnected" sound or shows "Unknown Device" in Device Manager, you are likely facing a driver conflict. This write-up covers the causes and the step-by-step solution to fix the USB driver issue. oppo vivo usb driver fix 9008
Note: Shorting test points voids warranty and requires skill. Proceed with caution. If you are still stuck, boot into a Linux Live USB (Ubuntu)
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 or a yellow exclamation mark in Device Manager. Flash using qmibox on Linux – it is
Arjun then had her open the MSM Download Tool (specific to her OPPO model). “Now,” he said, “press Volume Up + Volume Down and plug in the USB. The tool should see ‘COM10’ in green.”
: During installation, if prompted, select "Free Bld" (Free Build) to proceed.