→ Press and hold Volume Up + Volume Down together, then plug in the USB cable to your PC. The screen will stay black (that’s good). Your PC should detect “Qualcomm HS-USB QDLoader 9008” in Device Manager.
⚠️ Do not use files for CPH1853, CPH1819, or CPH1803. They have different partition tables and will brick your device. oppo cph1809 flash file qfil updated