Brom Disabled By Efuse 0x146 2021 Jun 2026

) now use "Custom Preloader" or "Custom DA" (Download Agent) files.

The BROM instruction set is physically "blown" (fused).

Traditional MTK bypass utilities (which exploit USB stack vulnerabilities) fail instantly because the chip drops the connection before executing the vulnerability exploit. brom disabled by efuse 0x146

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From a servicing point of view, the BROM is extremely valuable because it can be triggered even when the main flash is empty, corrupted, or boot‑looping. By shorting specific on the mainboard, you can force the device into BROM mode. In this mode, specialised tools—SP Flash Tool, various commercial “boxes” (Z3X, Pandora, etc.), or open‑source tools like mtkclient—can communicate directly with the chip, bypass many security checks, and perform low‑level operations such as:

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(especially Samsung and Vivo MTK models) almost all have this e-fuse blown.

This error typically appears in tools like SP Flash Tool, MTK Client, or unlock boxes (Pandora, UnlockTool). What is the BROM and efuse 0x146? The Boot ROM (BROM)

To understand the error, you must first understand the role of the .