Brom Disabled: By Efuse 0x146

Title: Understanding BROM Disabled by eFuse 0x146 — Causes, Implications, and Recovery Options

Summary

This article explains why a device’s Boot ROM (BROM) can become disabled when eFuse 0x146 is set, what that means for device behavior and security, and practical recovery or mitigation options for developers and engineers.

) now use "Custom Preloader" or "Custom DA" (Download Agent) files. brom disabled by efuse 0x146

Forensics and data preservation

3.2 Technical Meaning

Based on reverse-engineered Boot ROM dumps, 0x146 corresponds to a single eFuse bit that disables the normal BROM boot path. When blown: Title: Understanding BROM Disabled by eFuse 0x146 —

Anti-Theft/FRP: It prevents thieves from easily bypassing Factory Reset Protection (FRP) or screen locks via low-level flashing. : For Vivo specifically, some tools use a

1. Anti-rollback protection (ARB) – Prevents downgrading to vulnerable bootloaders.
2. Prevention of unauthorized flashing – Stops criminals from resetting FRP, bypassing locks, or injecting malware via low-level exploits.
3. Compliance with Google Play Integrity – OEMs must demonstrate hardware-backed security. An active BROM exploit voids attestation.
4. Reduction of support costs – Unbricking via BROM is expensive. Better to force motherboard replacement.

: For Vivo specifically, some tools use a "VFM" or "MTK Universal" approach that targets the Preloader instead of the BROM. Do you have a specific phone model that is giving you this error? Zuber Mobile