Extract the firmware package into a single folder on your desktop. Ensure MSM8x39DownloadTool.exe is located in the same folder as the firmware files (like prog_emmc_firehose_8939.mbn ). 2. Launch as Administrator
Ensure you are using the correct firmware for the MSM8x39 chipset.
The progress bar will turn green (or yellow) as it writes the system partitions. Troubleshooting Common Errors Error Message Potential Fix Re-install Qualcomm drivers or try a different USB port. "Firehose Communication Failed" msm8x39downloadtoolexe work
: Low-quality cables often cause the tool to fail mid-process.
Click in the tool to ensure the firmware files are intact. Click Start (or "Enum" then "Start"). Extract the firmware package into a single folder
This is the most critical step. Your phone must be in : Power off the device completely. Hold Volume Up + Volume Down simultaneously. Plug the phone into the PC while holding the buttons.
Disconnect the phone, hold the power button for 15 seconds to reset, and try EDL mode again. Launch as Administrator Ensure you are using the
that cannot boot into the OS or Recovery. Restore factory firmware to its original state. Unlock or relock bootloaders in specific service scenarios. Prerequisites Before Flashing