You will typically need to select this file manually in your flashing software for the following tasks:
Sometimes, the "All In One" file isn't enough. If you encounter errors like BROM ERROR: S_DA_HASH_CHECK_FAILED , it usually means: mtkallinonedabin
Creating a full dump of your phone’s current software before making changes. How to Use MTK_AllInOne_DA.bin You will typically need to select this file
Your version of SP Flash Tool is too old for the chipset you are trying to flash. Safety Warning mtkallinonedabin
The device has a locked bootloader that requires a Custom DA or an Auth File (.auth) provided by the manufacturer.