Brom Disabled By Efuse 0x146 Exclusive Jun 2026

Instead of attempting to crash the preloader to force BROM, updated service software uses the signed preloader itself to communicate with the chip.

MediaTek provides authorized download agents (auth DA files) to OEMs. These files contain cryptographic keys that match the eFuse values. If you obtain the correct for your exact device model and CPU, you can load it in SP Flash Tool and bypass the error.

While BROM mode operates before the preloader initializes, executes right after the preloader loads.

A technician received an Infinix Note 12 (Helio G99) with a corrupted software partition. When connecting to SP Flash Tool v5.21, the log showed: brom disabled by efuse 0x146

: This allows a technician to write directly to the chip's storage partitions without interacting with the locked-down MediaTek processor or its disabled BROM interface. 4. Physical SoC or Motherboard Replacement

: Historically, developers and technicians used BROM mode bypass exploits (such as Kamakiri) to bypass authentication, allowing them to read/write partitions, remove Knox/KG locks, or unbrick devices without official vendor authorization. 🔒 What is an eFuse and Hex 0x146?

The tool will target the MediaTek Preloader USB VCOM port instead of the MediaTek USB Port (BROM) . Method B: Physical Test Points (Hardware Grounding) Instead of attempting to crash the preloader to

The tool attempted to force the MediaTek processor into its low-level BROM execution loop. The processor checked its internal eFuse register map.

Since the EFuse is part of the processor (CPU), the only way to truly "fix" a 0x146 EFuse error is by replacing the main CPU itself, or replacing the entire motherboard. Conclusion

If the device is completely hard-bricked and will not respond to USB commands, technicians must bypass the USB controller entirely: If you obtain the correct for your exact

Use fine-tipped tweezers or a jumper wire to . While holding the short, plug in the USB cable.

with old exploits; they won't work. Update your drivers (specifically the LibUSB filters).