The error is widespread on:
is the very first code executed when a smartphone powers on. Hardwired directly into the processor, it acts as the device's foundation—initializing hardware, loading the next boot stages, and providing emergency recovery capabilities . This recovery mode is what many flashing tools rely on to access devices for repair or unlocking.
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 is a common hurdle in the device modding and repair community. Manufacturers and carriers often blow this fuse to prevent: Unauthorized Firmware Downgrades:
brom disabled by efuse 0x146, MediaTek BROM error, SP Flash Tool 0x146, eFuse debug disabled, bypass BROM security, auth file MediaTek. The error is widespread on: is the very
These are tiny fuses on the silicon die of the processor. They are programmed (blown) at the factory during production. Once a fuse is blown, it cannot be reversed.
However, a frustrating error message has become increasingly common among technicians and power users: . A technician received an Infinix Note 12 (Helio
Stop trying to force the device into a "VROM" or "BROM" state. Use tools that support "Preloader flashing."
The error message "BROM disabled by efuse 0x146" indicates a specific security state where the hardware-level entry point for low-level flashing has been permanently locked. The hex code
Shorting the clock line forces a physical interruption between the CPU and the flash storage, occasionally forcing the CPU back into a hardware emergency boot state that bypasses the standard eFuse routine checks. Method C: Server Authentication / Official Flash Tools
The low-level USB interface is physically disabled by hardware eFuses, preventing software tools from force-booting the device into an unprotected state.