An is a microelectronic fuse embedded inside the silicon of the CPU.
This error marks a fundamental shift in Android hardware security, hardware-level tracking, and anti-tamper mechanisms. Understanding this error requires looking closely at why it happens, what it means for device repair, and how to work around it. 1. What is BROM?
Identify the exact SoC (e.g., MT6765) and search for a specific to that brand.
The error is a low-level hardware protection mechanism encountered on MediaTek (MTK) devices during service operations like flashing firmware, bypassing FRP (Factory Reset Protection), or removing screen locks. This error means that the smartphone manufacturer has permanently burned a physical internal fuse (eFuse) inside the chipset to prevent standard Boot ROM (BROM) exploitation. brom disabled by efuse 0x146
Many Dimensity and newer Helio chips come from the factory with this fuse already set. Is there a workaround?
The "Brom disabled by Efuse[0x146]" error is a definitive hardware lock designed for security by the manufacturer, not a software bug that can be patched. While sometimes no immediate solution exists, users can still try:
While the "0x146" fuse means the "easy" door is locked, the "Preloader" door is usually still cracked open if you have the right authentication files. An is a microelectronic fuse embedded inside the
Some tools allow switching to Preloader mode (e.g., using “Advanced Authorization” options). If the tool reports “Advanced Authorization supported”, you may be able to perform limited tasks like FRP erase or firmware info reading. If it says “not supported”, you are out of luck.
To understand this error, you need to break down the technical components involved in MediaTek's security architecture. 1. What is BROM?
No. The test point method forces the chip into BROM mode by manipulating the boot pins. If the chip itself refuses to enter BROM mode because the eFuse is blown, no test point will bypass it. Technicians have confirmed that BROM will not appear even with test points on fused devices. The error is a low-level hardware protection mechanism
Manufacturers implement eFUSE locks for various reasons:
While you should check if the device can enter Preloader mode to attempt a stock firmware flash, be prepared that the device may require professional hardware repair or JTAG servicing to function again.