: Click "Choose" and select the Android_scatter.txt file from your stock ROM folder.

: Serial Link Authentication (SLA) and Download Agent Authentication (DAA) prevent unauthorized flashing tools from modifying system partitions.

Locate the exact stock firmware archive for your specific device model and region. The firmware folder must contain:

Older SP Flash Tools might not recognize the MT6781 scatter file.

Fix: Verify the processor target code inside the scatter text file matches your chip architecture.

Reinstall VCOM drivers or try a different USB cable/port. 5. Security & Risk Disclaimer Flashing firmware is an advanced procedure.