Brom Disabled By - Efuse 0x146

: It appears in forensic and repair logs when tools attempt to communicate with secure MediaTek chips. MediaTek Content Guidelines : Official MediaTek eFuse Guidelines

Traditional MTK bypass utilities (which exploit USB stack vulnerabilities) fail instantly because the chip drops the connection before executing the vulnerability exploit.

Programming eFuse 0x146 to disable BROM is a powerful security measure that prevents low-level access and enforces secure boot, but it is generally irreversible and eliminates common recovery channels. Engineers should treat its programming as a late-stage, controlled action and maintain documented, vendor-approved recovery and repair processes to avoid bricking devices in the field.

using unofficial, unknown tools.

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)

While there is no single academic "paper" titled after this specific hex code, the error is extensively documented in: Service Logs

This can sometimes force the processor to fallback into a state that allows communication. brom disabled by efuse 0x146

Think of an eFuse as a scratch‑off card: after the coating is removed, what's revealed stays revealed forever. It cannot be re‑covered.

Since the standard software bypass is physically disabled by the eFuse, you must use alternative communication ports. :

📌 Repeatedly attempting to force a bypass on a device with efuse 0x146 can occasionally lead to a "hard brick" if the Preloader partition becomes corrupted. Always backup your NVRAM and UserData if you manage to get a connection. To help you find a specific solution, could you tell me: What is the brand and model of the device? Which tool are you using (SP Flash Tool, UnlockTool, etc.)? Are you trying to unbrick it or remove a lock ? : It appears in forensic and repair logs

Similar to eFuses in other consoles and chips, it can be used to ensure the device never runs older, less secure firmware. Status of Fixes/Bypasses

One common use: . Why would you do that? Security.

Always ensure your specialized software features the latest definitions for your specific MediaTek chipset family. Engineers should treat its programming as a late-stage,