Brom Disabled By Efuse 0x146 Jun 2026

The device hardware is hard-coded to reject BROM instructions unless a specific RSA signature is provided.

The is the very first code executed by the MediaTek CPU when power is applied. It is mask-programmed into the silicon during manufacturing and cannot be modified or erased . The BROM is responsible for:

📌 Repeatedly attempting to force a bypass on a device with efuse 0x146 can occasionally lead to a "hard brick" if the Preloader partition becomes corrupted. Always backup your NVRAM and UserData if you manage to get a connection. To help you find a specific solution, could you tell me: What is the brand and model of the device? Which tool are you using (SP Flash Tool, UnlockTool, etc.)? Are you trying to unbrick it or remove a lock ?

You will need to short a specific pin on the motherboard (called a ) to the ground shield using metallic tweezers while plugging in the USB cable. brom disabled by efuse 0x146

The is the first piece of code that runs when you power on a MediaTek chipset. It is hardcoded into the silicon. Its job is to initialize the hardware and look for a bootloader to hand off control to. For developers and technicians, BROM mode is the "holy grail" because it allows for low-level communication with the device before the operating system or security software loads. The Significance of "efuse 0x146"

There is no shame in admitting that a device is permanently locked. In many cases, the cheapest and least frustrating solution is to replace the motherboard or sell the device for parts.

From a manufacturer’s perspective, disabling BROM download mode is a , not a bug. Reasons include: The device hardware is hard-coded to reject BROM

On many devices where the software BROM is disabled, you can still trigger a hardware-level override by opening the phone.

This error typically appears in software servicing tools like , UnlockTool , Pandora , or SP Flash Tool when you attempt to bypass security protections, service a device, or remove MDM/KG locks.

(electronic fuse) is a technology used in modern chipsets to permanently store security bits or configuration data. Once an eFuse is "blown" (programmed from 1 to 0 or vice versa), the change is irreversible. Manufacturers use eFuses to: The BROM is responsible for: 📌 Repeatedly attempting

These are microscopic electronic fuses inside the processor. Once they are "blown" (set to a specific value) during the manufacturing process, they cannot be unblown.

: In some cases, hardware faults or issues with the device's storage or memory can lead to this error.

If the device is soft-bricked and the Preloader loop is corrupted, you cannot boot into standard Preloader mode. Technicians must resort to a physical hardware .

brom disabled by efuse 0x146 has been observed in: