Have you ever wondered why your Infinix Note 7 X690B mobile completely shuts down when flashing fails? This usually happens when the secure boot layer blocks an unauthorized firmware. The DA file is the only thing that can bypass this layer and reactivate the boot. When the SP Flash Tool only writes the preloader and gives the rest of the partition error, then understand that the boot security is active inside the Infinix Note 7 X690B mobile. In such a case, if you use a custom DA file, then all these boundaries are removed and complete flashing becomes possible.
Some users complain that Infinix Note 7 X690B mobiles get brom error every time they flash. This is actually due to encryption, and the DA file is the encryption key that gives full access to the flashing tool. When the bootloader is not unlocking, recovery is not working, and fastboot is not detected, then only the DA file can be used to reboot the Infinix Note 7 X690B mobile in raw mode so that the system can be rebuilt. If you have ever tried to insert an unauthorized scatter file into a Infinix Note 7 X690B mobile with secure boot, you may have encountered error 0xC0030012. This is a sign that the DA file is either incorrect or missing. Without it, the firmware can never be installed.