In some cases, you must pay for daily credits or hire a remote technician with an authorized service center account to input their credentials and sign the flash process. 4. Utilize the "Preloader Exploit" (If Available)
: Do not attempt to flash older firmware over a device showing a 0x146 eFuse error. This can result in a hard brick that is difficult to recover.
The device has been flagged as "compromised," forcing the processor to disable the vulnerable BROM entry point. Solutions for "BROM Disabled by EFuse 0x146" brom disabled by efuse 0x146
Dev teams behind major multi-brand flashing suites constantly update their software to handle newer eFuse configurations. Specialized tools can often bypass modern security restrictions by using custom, proprietary download agents (DA files) or leveraging newly discovered exploits within specific Preloader versions.
Verify if a specific bypasses the BROM check on your specific chipset. In some cases, you must pay for daily
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.
On certain chipsets, locating a physical on the motherboard can bypass some electronic blocks. This can result in a hard brick that is difficult to recover
But if that next stage is corrupted? Or if you're trying to recover via USB boot, which the Boot ROM handles? The chip locks you out. No JTAG. No USB recovery. No second chance.
Some devices leave Preloader mode enabled even with BROM disabled. Try:
The error means that the device manufacturer has permanently blown a physical hardware fuse (eFuse) on your MediaTek device's chipset. This action forcibly blocks access to the low-level Boot ROM (BROM) mode.
When connecting the USB cable, do not hold any buttons, or hold only Volume Down (depending on the OEM) to force the phone into Preloader mode instead of BROM. 2. Use a Hardware Test Point (TP)