This error typically appears in tools like SP Flash Tool, MTK Client, or various unlock boxes (like Hydra, UnlockTool, or Pandora) when attempting to force the device into Boot ROM (BROM) mode. What Does the Error Mean?
Because an eFuse change is a physical, irreversible hardware state,
The Brom disabled by Efuse[0x146] error is a permanent hardware lock that manufacturers use to enforce security and prevent unauthorised low‑level modifications. For repair technicians and enthusiasts, encountering this message means traditional BROM‑based servicing is impossible. Understanding the role of eFuses and the irreversible nature of these locks is critical for anyone working with modern MediaTek devices. As manufacturers continue to tighten security, we can expect more sophisticated lockouts—making research and caution more important than ever.
The device may only boot to Fastboot or a logo, but lacks BROM access for repairs. ⚠️ Known Solutions (and Dead Ends) brom disabled by efuse 0x146
Manufacturers burn this specific fuse during factory assembly—or via mandatory Over-The-Air (OTA) firmware updates—to stop unauthorized third-party software installations, prevent device cloning, and block low-level exploits. 3. Why Do Manufacturers Disable BROM?
corresponds to a bitmask in the device’s security configuration register. When this specific fuse is blown, the SoC is instructed to ignore external "handshake" signals that would normally trigger BROM mode.
Connect the phone powered completely off. Let the tool catch the initial connection via the port instead of the MTK USB Port. Method 2: Authorized OEM Flashing Accounts This error typically appears in tools like SP
Using official service tools (like MiFlash for Xiaomi or Odin for Samsung) with an authorized technician account can sometimes still write to the device.
Ensure your flashing tool is set to "Preloader" instead of "BROM."
Shorting test points may still lead to the same 0x146 error if the fuse is global. The device may only boot to Fastboot or
Check if your device supports flashing instead.
The BROM is hard-coded memory located inside the SoC. When the device powers on, the CPU begins execution at the BROM address. Its primary functions are:
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