Flashing custom firmware or modifying system partitions always carries a risk of bricking your device. The MTK AUTH Bypass Tool itself is relatively safe (it does not write any data to the device), but improper use of SP Flash Tool can render a device permanently unrecoverable. Always ensure you have the correct firmware for your specific device model and region.
The tool features a minimalist graphical interface with a single primary button. Users simply click "Disable Auth" and connect their device. This simplicity makes the tool accessible even for users with limited technical background.
Try a different DA file (e.g., from the SP Flash Tool’s default set or from the firmware package). Perform the authentication bypass again before clicking "Download".