You might encounter one of these variations:
MediaTek (MTK) service tool, often used by technicians for flashing, unlocking, and repairing mobile devices with MediaTek chipsets. mtk module ver 158 download fix
Users attempting to download or update MTK Module Version 158 may encounter errors such as “Download failed,” “Checksum error,” “Connection timeout,” or incomplete installation. You might encounter one of these variations: MediaTek
Users attempting to download or install encounter one or more of the following: often used by technicians for flashing
If your phone is already bricked and none of the above works, the preloader itself might be corrupt.