Brom Disabled By Efuse 0x146 95%

Switch your software configuration from to Preloader Mode .

Check if your device supports flashing instead.

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The error code is returned by the BROM itself via USB handshake or UART. It breaks down as follows: brom disabled by efuse 0x146

For truly bricked devices where BROM is disabled, the only remaining option is (In‑System Programming). This involves physically desoldering the eMMC or UFS flash chip from the mainboard, reading/writing it with a dedicated programmer, and then soldering it back.

The server sends a cryptographically signed challenge-response key to the phone's preloader.

An (electronic fuse) is a microscopic fuse on the chip that can be "blown" (set permanently) by the manufacturer. Switch your software configuration from to Preloader Mode

Action: Ensure you are using the latest version of mtkclient . 3. Use Official Service Center Tools

From a servicing point of view, the BROM is extremely valuable because it can be triggered even when the main flash is empty, corrupted, or boot‑looping. By shorting specific on the mainboard, you can force the device into BROM mode. In this mode, specialised tools—SP Flash Tool, various commercial “boxes” (Z3X, Pandora, etc.), or open‑source tools like mtkclient—can communicate directly with the chip, bypass many security checks, and perform low‑level operations such as:

Because the BROM is physically disabled, standard USB-only methods often fail. Current workarounds usually involve: Preloader Mode This link or copies made by others cannot be deleted

To understand the problem, you first need to know how a MediaTek chip starts up.

If you want a tailored recovery plan

No. The test point method forces the chip into BROM mode by manipulating the boot pins. If the chip itself refuses to enter BROM mode because the eFuse is blown, no test point will bypass it. Technicians have confirmed that BROM will not appear even with test points on fused devices.