In 2020 and 2021, a major exploit was discovered that allowed users to bypass MediaTek security using a "Boot ROM exploit." This allowed anyone to bypass FRP or flash custom firmware without official authorization.
Switch your tool's setting from "BROM" to or "VBO" mode.
To counter this, manufacturers (specifically on MT6765, MT6833, and newer chips) began blowing the . This forces the device to only communicate via the Preloader , which is much easier for manufacturers to secure via digital signatures. Can You Fix "BROM Disabled by efuse 0x146"? brom disabled by efuse 0x146
For some high-security devices (like newer Xiaomi or Oppo models), the only way to bypass this is using an . The tool connects to the manufacturer's server, verifies a digital signature, and "unlocks" the path for the flash tool to proceed despite the fuse status. Summary for Technicians If you see 0x146 :
The tool will attempt to use a "signed" Download Agent (DA) to communicate through the Preloader. 2. The Test Point Method (Hardware) In 2020 and 2021, a major exploit was
Most modern professional tools (like UnlockTool or Hydra) now have an option to flash via .
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. This forces the device to only communicate via
is a specific status code indicating that the hardware-level "SLA" (Serial Link Authentication) and "DAA" (Download Agent Authentication) are strictly enforced.
Understanding the "BROM Disabled by efuse 0x146" Error If you are trying to unbrick, flash, or bypass the FRP (Factory Reset Protection) on a MediaTek (MTK) device and encounter the error you have hit a significant security roadblock.