: Generally lightweight (approx. 32 MB) and does not require disabling antivirus software for most versions. How to Use the Tool Enable Diag Mode : You must enable Diagnostic Mode on your Android device (often via *#*#717717#*#* or ADB commands) so the PC can recognize the COM port. Backup Original QCN : Always use a tool like UMT QcFire to backup your current QCN file first. Edit with V10