Brom Disabled By Efuse 0x146 Extra Quality

Article last updated: 2025 – for MediaTek chipsets up to Dimensity 9300. Information based on reverse engineering efforts from the MTK community and public BROM dumps.

If the BROM is dead but the eMMC is accessible via an external programmer (direct eMMC connection):

If the device contains irreplaceable data and you have micro‑soldering skills, ISP (desoldering the flash chip) is technically an option. For most people, this is not practical. brom disabled by efuse 0x146

The technician uses a certified OEM server account to sign the challenge.

A few persistent myths circulate around the eFuse 0x146 error: Article last updated: 2025 – for MediaTek chipsets

The device validates the signature and temporarily allows flash access. Method 3: Hardware ISP (In-System Programming)

JTAG / ICE / debug connectors

To avoid such issues in the future:

Mi Flash Tool (requires authorized account for newer models). Oppo/Realme: Oppo Download Tool or MSM Download Tool. For most people, this is not practical