. This process is typically used to repair "dead" devices, remove screen locks, or fix software hang issues. Prerequisites Device Drivers: Install the Qualcomm HS-USB QDLoader 9008 Driver to ensure your PC communicates with the phone in EDL mode. Flash Tool: Download and install the QPST (Qualcomm Product Support Tool) , which includes the application. Acquire the correct CPH1809 Stock ROM (firmware) specifically for your region/model version. Flashing Procedure Launch QFIL:
: You need the "Flat Build" version of the firmware which includes: Programmer File : Usually named prog_emmc_firehose_xxxx.mbn : Specifically rawprogram0.xml patch0.xml Flashing Procedure via QFIL Launch QFIL : Open the application and select "Flat Build" as the build type. Load Firmware to select the prog_emmc_firehose file from your firmware folder. rawprogram0.xml , followed by patch0.xml in the popup that appears. Enter EDL Mode Power off the device. Volume Up + Volume Down simultaneously and connect it to the PC via USB. Successful connection is indicated by the status "Qualcomm HS-USB QDLoader 9008" appearing at the top of QFIL. Execute Flash : Click the button. A blue progress bar will appear. Do oppo cph1809 flash file qfil updated
Power off the phone. Hold Volume Up + Volume Down simultaneously and connect it to the PC via USB. QFIL should show "Qualcomm HS-USB QDLoader 9008". Flash Tool: Download and install the QPST (Qualcomm
package. Restart the QFIL tool, reconnect the device in EDL mode, and use a direct motherboard USB port. 2. Device Manager Shows "Unknown Device" Load Firmware to select the prog_emmc_firehose file from
Flashing firmware will wipe all data and carries a risk of permanent damage if done incorrectly. Proceed only if you have technical experience.