Forensics and data preservation
Boot alternative official boot paths
Ensure your flashing tool is set to "Preloader" instead of "BROM."
This requires opening the device and carries a high risk of permanent damage. 3. Authorized Accounts (Auth) brom disabled by efuse 0x146
If you are building a tool or running a script and see 0x146 : Security Level 3/High.
You may need the specific or an EMI/DA file specific to your exact model and firmware version to handshake with the Preloader. 2. Test Point (Hardware Method)
Identify the exact SoC (e.g., MT6765) and search for a specific to that brand. You may need the specific or an EMI/DA
For many newer Xiaomi or Oppo phones with 0x146 enabled, the only way to flash is using an .
| | Model(s) Reported | | --------------- | ----------------------------------------------- | | Vivo | V2139, Y21, Y21A, Y15S (V2120), Y53s 4G (V2109) | | Samsung | A037M, A107F, S134DL, S215DL | | BLU | Various models with MT6761 (Helio A22) | | TCL | T433D | | Honor | X7a | | Motorola | Edge 60 Fusion |
: Software options like Hydra Tool, UnlockTool, or specialized vendor portals can send commands through the preloader port rather than forcing a BROM state. 3. Hardware Test Points (Physical Bypass) For many newer Xiaomi or Oppo phones with
: Technicians use BROM mode to bypass device security protocols, perform deep formatting, or repair altered partitions without needing the phone to boot into the operating system.
corresponds to a bitmask in the device’s security configuration register. When this specific fuse is blown, the SoC is instructed to ignore external "handshake" signals that would normally trigger BROM mode.
Avoid "re-locking" bootloaders on custom ROMs, as this often triggers the fuse. To help you find a specific workaround, let me know: Your ? Which tool gave the error? Your end goal (unbricking, unlocking, or flashing)?