Brom Disabled By Efuse 0x146 Jun 2026

Once an eFuse is "blown" (set from 0 to 1), it cannot be reverted.

brom disabled by efuse 0x146 is the chip's way of saying, "I have been permanently configured to distrust my own starting code. You cannot wake me the old way. Bring a new chip or the correct secure boot image—there is no back door." brom disabled by efuse 0x146

Older chips like MT6580, MT6737, or MT6753 rarely, if ever, blow this eFuse. Once an eFuse is "blown" (set from 0

Attempting to flash older software onto a device that has already received a security update that blew the eFuse. Bring a new chip or the correct secure

eFuses (Electronic Fuses) are one-time programmable memory bits. They are used to store permanent configuration data, such as:

When you attempt to connect your phone in BROM mode (usually by holding the volume buttons while connecting the USB cable), the device's bootloader checks the hardware eFuses.

This specific hex code signals to your computer's servicing software that the BROM pathway is permanently physically severed.