Brom Disabled By Efuse 0x146 Best Jun 2026

: While some older security patches disabled BROM via software (which could be bypassed by shorting a CLK pin to ground), the

: For many Vivo and Samsung MTK devices, you must select the specific model in your tool and use a "Custom Preloader" or "Custom DA" (Download Agent) file that is compatible with the new 2023+ security patches. VBOOT/Meta Mode : Some operations can still be performed in Factory Mode , which do not require the BROM exploit to function. Hardware Test Points

Because eFuses cannot be reset physically or via standard code, you cannot change 0x146 back to an open status. Instead, you must use alternative communication interfaces that bypass the disabled BROM entirely. 1. Shift to Preloader Mode Flashing

If the BROM is disabled, you cannot flash a custom ROM via traditional methods. You must bypass the BROM check entirely using specialized tools. brom disabled by efuse 0x146 best

An eFuse (electronic fuse) is a microscopic fuse etched into the silicon of the MediaTek system-on-chip (SoC). During factory production or through a late-stage software update, the manufacturer sends a high voltage through specific circuits to break these fuses. Once blown, the state is permanent and cannot be reversed by software or flashing commands. The Meaning of Hex Code 0x146

Yes, you read that correctly. Since eFuses are physically part of the silicon, the only way to "unblow" 0x146 is to remove the CPU and replace it with a new, unused one from a donor board.

Instead of just plugging in the USB, connect the device while holding or Volume Up only , ensuring the driver recognizes it as MediaTek Preloader USB VCOM rather than BROM. 3. Hardware-Level Bypass (Expert Only) : While some older security patches disabled BROM

If you are reading this, you have likely been staring at a flashing tool log (SP Flash Tool, Miracle Box, or CM2 MT2) that suddenly halted progress with the dreaded error:

For technicians: Only an authorized EMI authentication file or direct eMMC programming (JTAG/ISP) can bypass this — and that requires factory-level credentials or hardware intervention.

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. You must bypass the BROM check entirely using

is the first piece of code that executes on a processor when it is powered on. It acts as a failsafe, low-level "factory mode" that can communicate with flash memory independent of the main operating system. For years, this mode has been the ultimate backdoor for technicians to perform operations like flashing firmware, removing FRP (Factory Reset Protection), or repairing IMEI numbers, even on bricked or otherwise non-functional phones.

When the BROM checks this efuse at boot, it finds that the bit is . The configuration at 0x146 tells the BROM: "Do not allow any unauthorized or unauthenticated download agent (DA) to run. Disable DMA access. Force a secure handshake only."

: Instead of forcing the device into a BROM state, you leverage the phone's factory Preloader to accept commands. How to execute :

Sometimes the error isn't just the fuse; it's that the software doesn't know how to talk to your specific chip version.