If you’ve ever tried to unbrick or flash a modern MediaTek (MTK) device and were met with the error you know the frustration. This isn't just a simple software bug; it's a hardware-level security implementation designed to block unauthorized access to the BootROM.
You will need a specialized tool like UnlockTool , Pandora Box , or Chimera to send the "Exploit" command immediately after the device is detected via Test Point. 2. Preloader-to-BROM "Crash" Method brom disabled by efuse 0x146 best
The error message "BROM disabled by efuse 0x146" typically occurs on Samsung and other MediaTek (MTK) devices with updated security patches. It indicates that the manufacturer has permanently disabled BootROM (BROM) mode If you’ve ever tried to unbrick or flash
The device is forced to use the "Preloader" mode instead of the "BROM" mode. Best Methods to Fix or Bypass Error 0x146 Best Methods to Fix or Bypass Error 0x146
If you are using SP Flash Tool and see this error, go to and make sure the "Connection Type" is set to UART or USB (depending on your cable), and try unchecking the "Auto Detect" feature to manually select the Preloader port once the device is connected.
: Many traditional bypass tools cannot re-enable BROM once this fuse is set, making standard "one-click" bypasses ineffective on newer security patches. Best Solutions and Workarounds
Now, we connect the dots.