The only correct way to bypass the 0x146 restriction is to use an authenticated Download Agent (DA) signed with a key that matches the efuse configuration. Unauthorized DAs (like the generic MTK_AllInOne_DA.bin) will fail immediately.

  • Success rate: 95% (if the bootloader is still intact).

    • If the efuse at 0x146 is truly burned, and no authenticated DA exists, no software trick will help. This is because the decision is made in hardware within microseconds of power-on.

    If you are reading this, you have likely been staring at a flashing tool log (SP Flash Tool, Miracle Box, or CM2 MT2) that suddenly halted progress with the dreaded error: "BROM Disabled by Efuse 0x146."

    For many repair technicians and bootloader hackers, this error feels like a digital dead end. It appears when you attempt to flash, unbrick, or bypass the security on newer MediaTek-powered devices. Unlike older "BROM errors" that could be bypassed with preloaders or auth files, error 0x146 signals a fundamental hardware-based lockdown.

    In this comprehensive guide, we will break down what this error means, why it is different from previous security mechanisms, and—most importantly—the best known methods to resolve or work around it.