Select the scatter file or the firmware folder provided with your ROM. Connect Device: Power off your phone completely. Volume Up + Volume Down simultaneously. Connect the USB cable to the PC. Start Process:

: Turn off your phone. Press and hold the Volume Up or Volume Down buttons while connecting the device to your PC via a USB cable.

Unlike consumer-facing apps, many versions of this tool require an internal license file or "Download Tool Enabler" to function outside of official service centers.