The device is forced to use the "Preloader" mode instead of the "BROM" mode. Best Methods to Fix or Bypass Error 0x146
| Prevention | Action | |------------|--------| | from an unknown source. Uncheck PRELOADER in SP Flash Tool. | ✅ | | Do not downgrade from Android 11 to 10 or 9 on MediaTek. | ✅ | | Block OTA updates if you plan to flash custom ROMs. | ✅ | | Backup full firmware (including preloader) before updating. | ✅ | | Use MTK Client or SP Flash Tool readback before making changes. | ✅ | brom disabled by efuse 0x146 best
Attempting to force BROM on an eFuse-locked device can lead to a state where the device no longer turns on if the Preloader is corrupted. The device is forced to use the "Preloader"
Sometimes the 0x146 error is a false positive caused by bad drivers. Uninstall all MediaTek drivers. Use to "Filter" the MediaTek USB Port . | ✅ | | Do not downgrade from
By disabling BROM via eFuse 0x146, manufacturers (like Xiaomi, Samsung, or Vivo) effectively close this "backdoor," making the device significantly more secure but also much harder to service outside of authorized centers. Can You Fix or Bypass It?
To understand the error, you must first understand BROM.