: For many Vivo and Samsung MTK devices, you must select the specific model in your tool and use a "Custom Preloader" or "Custom DA" (Download Agent) file that is compatible with the new 2023+ security patches. VBOOT/Meta Mode : Some operations can still be performed in Factory Mode , which do not require the BROM exploit to function. Hardware Test Points
:Since BROM is locked, you must flash through the Preloader port instead. In tools like SP Flash Tool or MTK Auth Bypass tools, ensure you are selecting "Preloader" as the connection type rather than "BROM." brom disabled by efuse 0x146 best
Tools like SP Flash Tool can still detect the phone, but the second they try to send a "DA" (Download Agent), the BROM rejects it and throws error 0x146 . : For many Vivo and Samsung MTK devices,
Putting it all together, the message suggests that the device's BROM functionality has been disabled through a specific efuse setting (0x146), which could be a configuration meant to offer the best performance or security profile for the device. This kind of configuration or change is usually made by advanced users or during the manufacturing process. In tools like SP Flash Tool or MTK