Switch your software configuration from to Preloader Mode .
When a tool reports efuse 0x146 , it means the smartphone manufacturer (such as Xiaomi, Oppo, Vivo, or Realme) has intentionally blown a specific security fuse on the CPU.
: Some technicians attempt "test point" methods to force the device into a different state, though the 0x146 lock is designed to be resilient even against these physical interventions.
If an unauthorized attempt was made to bypass security, the hardware security module within the MediaTek chip may have automatically blown the fuse to render the device secure-boot-locked permanently. 3. Implications: Can it be Fixed? brom disabled by efuse 0x146
For the average user, encountering this error likely means your device is beyond DIY software repair. Professional services with access to signed authentication files or ISP (In-System Programming) programmers may still recover the device. For everyone else, the error signals a permanent hardware security gate that cannot be opened by standard means.
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What is your ultimate goal—are you trying to , remove a factory lock , or flash custom firmware ? Share public link Switch your software configuration from to Preloader Mode
using unofficial, unknown tools.
Instead of attempting to crash the preloader to force BROM, updated service software uses the signed preloader itself to communicate with the chip.
Since the BROM interface is disabled, you must communicate with the device through the . The Preloader is the second-stage bootloader stored in the device's flash storage (eMMC or UFS). If an unauthorized attempt was made to bypass
The error means that the device manufacturer has permanently blown a physical hardware fuse (eFuse) on your MediaTek device's chipset. This action forcibly blocks access to the low-level Boot ROM (BROM) mode.
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Search online for a exact for your specific phone model.
If you connect a fully functional, stock phone to SP Flash Tool and attempt to download preloader or DA (Download Agent) without an authorized DA file signed by MediaTek, the BROM reads the eFuse state. Upon seeing that the debug fuse is blown (value = 0x146 status), it refuses the connection and throws the error.