Newer MTK chips require a Secure Boot Auth file.
Using an outdated version of SP Flash Tool for a modern chipset. Step-by-Step Solutions 1. Fix the VCOM Drivers
The "Download DA" phase is when the tool sends a small piece of code to the phone's RAM to manage the flashing process.
Avoid USB 3.0 (blue) ports; SP Flash Tool often prefers USB 2.0 ports .