If you have flashed BLU Vivo One Plus mobile with wrong region firmware, then many problems arise, such as no network, invalid IMEI, or touch not working. At such a time, if you try to flash the original firmware back, then secure boot fail error comes up. Because the protection mechanism of the mobile detects that unauthorized or repeated flashing is happening. DA Auth File acts as a trusted agent here which temporarily convinces the mobile that this process is safe. When you reload the scatter file through DA file, the mobile not only accepts it but also starts showing better performance than before. The special thing about this process is that the user does not have to unlock the bootloader, nor does he have to use any risky exploit, only DA Auth File is enough..
When BLU Vivo One Plus mobile gives the message "brom error status_sec_img_type_mismatch" during flashing, most users do not understand where the problem lies. Actually, this problem occurs when the format of the preloader or boot image in your selected firmware does not match the security structure of the mobile. Here, the DA Auth File acts as a converter or translator. This file, with the help of specific algorithms, allows the SP Flash Tool to bypass the secure boot partitions and write the image that is usually blocked. Without this process, not only flashing is not possible, but continuous attempts can also permanently kill the mobile. But when the same process is completed through the DA file, not only the flashing is successful but the performance and compatibility of the mobile can also be improved.