Brom Disabled By Efuse 0x146 ❲NEWEST ◉❳

: If the eFuse block is absolute across the boot structure, even a physical test point may fail to force standard BROM, leaving META mode or authorized vendor logins as the remaining valid paths. Best Practices for Mobile Technicians

To understand the error, you have to look at how a MediaTek (MTK) processor starts up.

[PL] BOOTROM START [PL] eFuse 0x146 = 1 [ERR] BROM disabled by efuse 0x146 [PL] HALT

Because this is a hardware-level lock, you cannot undo the blown fuse. However, you can use alternative methods to flash your device or bypass the restriction depending on your phone model. Method 1: Use Preloader Mode Instead of BROM brom disabled by efuse 0x146

This is the very first code executed by the MediaTek CPU upon powering on. It resides in read-only hardware. It is used to initialize the device and acts as a gateway to flash new firmware via tools like SP Flash Tool when the main operating system (Android) is broken or inactive.

"It is a driver issue on my PC." Fact: While driver problems can cause other BROM errors (e.g., 0x13 or STATUS_BROM_CMD_SEND_FAIL ), error 0x146 is a security response from the chipset itself.

If you are trying to unbrick, flash, or bypass the security on a MediaTek (MTK) powered smartphone and encountered the error message , you have run directly into a hardware-level security lock. : If the eFuse block is absolute across

(electronic fuse) is a technology used in modern chipsets to permanently store security bits or configuration data. Once an eFuse is "blown" (programmed from 1 to 0 or vice versa), the change is irreversible. Manufacturers use eFuses to:

Here is a comprehensive guide to what this error means, why it happens, and the actionable methods you can use to bypass or resolve it. What is the MediaTek BROM?

If your device is hard-bricked and the Preloader is corrupt or missing, the phone cannot boot into Preloader mode, and BROM is blocked by the eFuse. In this scenario, your only software-hardware bridge is a physical . Disassemble the phone to expose the motherboard. However, you can use alternative methods to flash

The hexadecimal value 0x146 is a status register code indicating that Why do manufacturers do this?

In SP Flash Tool, ensure you have the correct preloader.bin for your exact model. 2. Test Point (Hardware Shorting)

While the eFUSE lock cannot be reversed, some alternative paths may still exist depending on the device's specific security configuration.

: In extreme cases, if BROM is needed for data recovery, specialized labs may attempt hardware-level glitching (voltage glitching), though this is complex and risky. specific device model (e.g., MT6765, MT6833) are you currently working on?