Oppo A78 Refurbished Firmware

This is a technique used by repair shops to forcibly overwrite the demo/refurbished firmware with a stock ROM.

The for your specific regional variant (CPH...). Step-by-step videos for your specific repair scenario. The official Oppo Support page for your device. oppo a78 refurbished firmware

– Power off the phone completely. Press and hold Volume Up + Volume Down buttons simultaneously and connect the USB cable to your PC. Continue holding the buttons until the flashing tool detects your device. This is a technique used by repair shops

What are you currently trying to fix?

Switch USB ports (prefer USB 2.0 ports on the back of your motherboard). Replace your USB cable and reinstall the drivers. The official Oppo Support page for your device

Download and install MTK USB Drivers . Disable Windows Driver Signature Verification (Shift + Restart > Troubleshoot > Startup Settings).