Brom Disabled By Efuse 0x146

This error typically appears in tools like SP Flash Tool, MTK Client, or various "unlock boxes" (UnlockTool, Chimera, etc.). Here is a deep dive into what this means and what you can do about it. What is BROM?

Tools that rely on the "MTK Bypass" exploit (like older versions of MTKClient) will no longer work. Preloader Dependency: The device will now only communicate through the

: If a device is stolen, physical access to the device usually allows a malicious actor to rewrite partitions via BROM. Disabling it ensures the factory reset protection (FRP) cannot be wiped by flashing tools. 3. The Technical Consequences brom disabled by efuse 0x146

If you are stuck on this error right now, follow these steps sequentially:

The consistent factor across all affected devices is a . The error appears across different chip families, suggesting that disabling BROM via eFuse is a strategic security decision implemented by device manufacturers. This error typically appears in tools like SP

Background — BROM, eFuses, and secure boot

Researchers have found that on some chips, eFuse 0x146 is – meaning a soft fuse bit can override the hard fuse if the boot ROM has a bug. This has led to a few successful bypasses on older MediaTek platforms. Tools that rely on the "MTK Bypass" exploit

Modern tools like Pandora Box or UnlockTool attempt to exploit the Preloader stage directly rather than trying to hit BROM.

If you want a tailored recovery plan