An (electronic fuse) is a microscopic fuse on the chip that can be "blown" (set permanently) by the manufacturer.
If your device displays “Brom disabled by Efuse[0x146]”, here is a step‑by‑step check list:
Ensure your flashing tool is set to "Preloader" instead of "BROM."
October 26, 2023 Subject: Analysis of Boot ROM (BROM) Disablement via eFuse Configuration 0x146 Status: Informational / Security Advisory brom disabled by efuse 0x146
When the value at 0x146 is read by the SoC's power management or early boot logic:
If you are seeing this error in your SP Flash Tool, UBoot logs, or UART terminal, you have encountered MediaTek’s most aggressive anti-rollback and anti-exploit mechanism to date. This article explains what this error means, how it works at the silicon level, why 0x146 is significant, and whether there is any way to bypass it.
BROM Disabled by eFuse 0x146: What It Means and How to Fix It An (electronic fuse) is a microscopic fuse on
: It initializes basic hardware, verifies the primary bootloader, and establishes a secure environment.
Some tools can still work in if the device allows it. The Preloader is the first piece of code loaded by the BROM, and it still runs (otherwise the phone could not boot Android at all). In Preloader mode, you may be able to perform certain operations:
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Receiving the brom disabled by efuse 0x146 message is a clear sign that a device is running modernized, hardware-enforced security. Software cracks can no longer alter this state because the internal physical fuse is blown.
Release the tweezers once the computer detects a connection port. This bypasses the standard boot sequence and forces the chip to communicate. Method 3: Authorized Service Tools (Service Accounts)
: Micro-soldering thin wires directly to the motherboard’s CMD, CLK, and DAT0 lines on the EMMC or UFS flash storage chip.
Historically, the BROM was the ultimate fallback mode for unbricking phones. If a user corrupted their operating system or recovery partition, they could bypass everything and force the phone into BROM mode to flash a fresh firmware image. 2. The Role of the eFuse (Value 0x146)