Since the software shortcut to BROM is disabled, you must manually trigger it.
The is a physical hardware fuse inside the CPU. When a manufacturer (like Xiaomi, Vivo, or Oppo) "blows" this fuse during production, it tells the chip: "Do not allow unauthorized access to BROM mode via the standard USB cable shortcut."
Sometimes the error isn't just the fuse; it's that the software doesn't know how to talk to your specific chip version. brom disabled by efuse 0x146 best
Use a tool like MTK Auth Bypass Tool (by MCT) or LibUSB . These tools "exploit" the stack to disable the security check momentarily, allowing SP Flash Tool to communicate with the device. 3. Update Your DA (Download Agent) File
Shorting the Test Point forces the processor into BROM mode, bypassing the efuse check that happens during a standard button-combination boot. Since the software shortcut to BROM is disabled,
When you see this error, it means the software is trying to send a command to the BROM, but the CPU is rejecting it because the security fuse is active. The Best Ways to Fix "BROM Disabled by efuse 0x146"
Ensure you have the MediaTek USB VCOM drivers installed correctly. A "Device Not Recognized" error can sometimes mimic an efuse error. Use a tool like MTK Auth Bypass Tool (by MCT) or LibUSB
You open the back of the device and use a pair of tweezers to short a specific gold point (the Test Point) on the motherboard to the Ground (GND).
If you are trying to flash a MediaTek (MTK) device and encounter the error , you’ve hit one of the most frustrating security roadblocks in modern smartphone repair.
If BROM is permanently disabled and Test Points aren't an option, some tools allow you to flash via .