If you just need to unbrick your BD4j, first try – sometimes it works with the preloader’s built-in DA. Add the custom DA only if you get DA_HASH_MISMATCH or S_SECURITY errors.
: Modern MTK devices have "Secure Boot" that blocks unauthorized flashing. The DA file provides the necessary handshake to allow the computer to communicate with the phone. Software Repair tecno bd4j da file
Because this device uses secure boot, you may also need an .auth file if the tool does not have a built-in "MTK Auth Bypass" feature. If you just need to unbrick your BD4j,
: This usually means the DA file is not compatible with the device's secure boot. Try using an "Auth Bypass" tool. Preloader Port Only tecno bd4j da file