Brom Disabled By Efuse 0x146 [verified] Jun 2026

To avoid such issues in the future:

: You will need an updated service tool that explicitly supports "Preloader Mode" flashing for your specific chip model. Method 2: Authorized Xiaomi/Oppo/Vivo Accounts

: It forces all deep-level software repairs to go through official channels using authorized login accounts. How to Bypass or Fix "BROM Disabled by eFuse 0x146"

However, depending on your specific device model, you might be able to the restriction or use an alternative entry point. Common Workarounds and Solutions

Ensure your servicing tool is updated to support the specific device security patch. brom disabled by efuse 0x146

Summary

In older MediaTek devices, BROM mode was a "backdoor" used by developers and repair technicians to bypass security. By disabling it via e-fuse , the device is now restricted: Hardware-Level Lock: The change is permanent and cannot be reversed by software. BROM Bypass Blocked:

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

If you want to troubleshoot your specific device, tell me the of your phone and the software tool you are using so I can provide customized instructions. Share public link To avoid such issues in the future: :

Do not attempt to force BROM mode via keys or shorting test points.

: 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

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.

It indicates that the manufacturer has "blown" a hardware fuse (e-fuse) to permanently lock the low-level Boot ROM (BROM) Common Workarounds and Solutions Ensure your servicing tool

If you are building a tool or running a script and see 0x146 : Security Level 3/High.

: Professional multi-brand servicing tools (such as UnlockTool , DFT Pro , or Chimeratool ) regularly update their software with proprietary algorithms designed to bypass the 0x146 eFuse lock on supported models. Check their official support lists to see if your exact device chipset is compatible. Summary of Best Practices

When BROM mode is blocked by an eFuse, standard automated scripts will fail, often throwing errors or getting stuck on steps like "Jumping to BROM". Servicing these newer security patches requires alternative technical methods.