Once you have the file, here is how to use it to flash a dead Infinix phone.
Warning: Using bypass methods to unlock bootloaders, remove FRP, or flash unofficial firmware voids the warranty and may permanently brick the device if incorrect DA versions are used.
Expected outcome:
If you still see an auth error:
No. Bootloader unlocking (via fastboot oem unlock) affects Android OS verification, not the preloader/DA authentication. You still need the DA Auth file to flash via SP Flash Tool. Infinix MTK DA Auth File
Prior to 2018, MediaTek devices were extremely easy to flash. Anyone with SP Flash Tool could overwrite any partition, leading to:
To combat this, MediaTek introduced Secure Boot and DA Authentication (SLA and DAA - Secure Download Agent). Once you have the file, here is how
Cloud-based tools like UnlockTool, MCT (MediaTek Client) , and NCK Pro offer DA Auth as part of a subscription.