Brom Disabled By Efuse 0x146 Best |link|
Caution: This requires opening the device and carries a high risk of permanent damage. Using Preloader Mode Newer tools like UnlockTool ChimeraTool MTK Client GUI attempt to communicate via the instead of the BROM. Ensure you have the specific DA (Download Agent)
If you're not comfortable with DIY repairs or software fixes, seek help from a professional technician who specializes in your device brand.
The error message "BROM Disabled by eFuse 0x146 Best" can be a perplexing issue for users who encounter it, particularly those who are not well-versed in the technical intricacies of their devices. This error is commonly associated with smartphones, specifically those manufactured by Chinese companies like Xiaomi, Redmi, and others that utilize MediaTek processors. The error essentially indicates that the device's Boot Read-Only Memory (BROM) has been disabled or compromised due to an eFuse (electrical fuse) setting, specifically at address 0x146.
The immediate impact is that standard software tools (e.g., SP Flash Tool, MTKClient, Z3X Box) become useless for connecting to the phone. The device might be stuck in a bootloop, bricked, or with a locked FRP, and you cannot perform a low-level flash to resolve it. However, the device may still be detected by the computer in "PRELOADER" mode rather than "BROM" mode. The Preloader is a small program loaded by the BROM; some maintenance operations can still be performed in Preloader mode, but it is more restrictive than BROM mode.
: This is a hexadecimal value. In this context, it likely refers to a specific efuse address or value that controls the BROM. brom disabled by efuse 0x146 best
If the software-only crash method fails, you must use physical grounding:
Look for the specific option labeled or "Force BROM via Preloader" . Power off the device completely.
Click the desired service action (e.g., Erase FRP or Factory Reset) and connect the phone while holding both volume keys without any hardware modifications first. Step 2: Isolate the Hardware Test Point
Ensure you have the latest MediaTek USB Drivers and LibUSB-Win32 filter drivers installed on your computer. Without these, your PC will drop the device connection instantly. Caution: This requires opening the device and carries
Encountering the "BROM disabled by Efuse[0x146]" error can be a disheartening experience. It represents a fundamental shift in device security, moving away from a software-based barrier to a permanent, physical one. While there is no magic software fix to re-enable BROM, understanding the error helps you avoid wasting time on fruitless button combinations.
It tells your computer: "I see you're trying to talk to my BROM, but my hardware instructions say that BROM is now forbidden." ⚡ Is there a "Best" solution?
The error message typically occurs on Samsung devices with MediaTek (MTK) processors when a security mechanism, often related to Knox Guard (KG Lock) , has permanently blown a hardware fuse to prevent low-level flashing via Boot ROM (BROM) mode .
On newer device patches, the preloader requires a security token signed by the manufacturer's official servers to accept commands. The error message "BROM Disabled by eFuse 0x146
The error BROM disabled by Efuse [0x146] appears in the logs of professional flashing tools like Pandora Box or Miracle Box when technicians try to connect to a device. It indicates that the manufacturer has permanently disabled access to the device's BROM (Boot ROM) mode.
In essence, the tool is trying to open a door, but the eFuse has permanently locked it from the inside.
For many newer devices (especially those with "KG" or "Cloud" locks), the only stable solution is using a manufacturer-authorized account through tools that support "Server Auth".