There is a common misconception that you can "reset" this fuse. Once an efuse is blown, it is a permanent physical change to the processor. However, there are two ways to work around it: 1. Use "Preloader Mode" Instead of BROM
: It allows tools like SP Flash Tool to communicate with the device before the operating system or bootloader loads.
Unlike traditional fuses that break under excess power, an eFuse is intentionally blown by software commands or automated factory routines via a high-voltage pulse. brom disabled by efuse 0x146
When a tool reports BROM disabled by eFuse 0x146 , it means the smartphone manufacturer has intentionally destroyed the physical pathway to BROM mode to enforce security compliance. This primarily happens under two scenarios: 1. Vendor Security Upgrades (Anti-Exploit Patches)
Odin (uses Download Mode instead of MTK BROM architecture). Summary of Best Practices There is a common misconception that you can
Stop trying to use old, outdated MTK bypass scripts; they will continue to fail.
[ERROR] : BROM disabled by eFuse 0x146 (Secure debug disabled) Use "Preloader Mode" Instead of BROM : It
To write data to a device with a blown 0x146 eFuse, the flashing tool must pass through official vendor servers to get a cryptographic signature ("Auth"). Professional technicians use authorized brand accounts to sign the boot files dynamically during the flashing sequence, allowing the phone to accept the new software. 3. ISP (In-System Programming) Hardware Connection
Do not attempt to force BROM mode via keys or shorting test points.
When a chip returns this error, it heavily restricts standard recovery and repair workflows. Because the block occurs inside the CPU architecture before the storage drive (UFS or eMMC) even initializes, .
The short answer is for standard tools and methods. The long answer is nuanced.