Some devices require an official service account to flash via "Download Mode" or "EDL" instead of BROM.
This article explains why a device’s Boot ROM (BROM) can become disabled when eFuse 0x146 is set, what that means for device behavior and security, and practical recovery or mitigation options for developers and engineers. brom disabled by efuse 0x146
Understanding the "BROM Disabled by efuse 0x146" Error If you are trying to unbrick, flash, or bypass the Factory Reset Protection (FRP) on a MediaTek (MTK) device and encounter the error you have hit a significant security roadblock. Some devices require an official service account to