This points to a connection issue. Try a different USB port (preferably USB 2.0), replace the cable, or reinstall the VCOM drivers.

Yes. The version is legally and freely distributed. MediaTek originally provided this tool to ODMs and service centers, but it has since become public. However, caution is necessary:

MediaTek tools are exclusively compatible with MTK processors (e.g., MT6735, MT6580). Attempting to load firmware meant for Qualcomm Snapdragon, Exynos, or Unisoc processors will cause initialization failures.

Click the green arrow button at the top of the interface. The tool will enter standby mode, waiting for the device connection.

Users can install or update stock firmware using ".scatter" files that map out the device's partitions.

Repair "bootlooped" or completely unresponsive (hard-bricked) phones.

Downloading MTK Flash Tool v5.1420 is straightforward. Here are the most reliable sources to obtain this tool for free:

Windows 7, 8, 10, or 11 (32-bit or 64-bit) / Ubuntu Linux.

Open Windows Device Manager, check for any yellow exclamation marks under ports, and reinstall the MediaTek USB drivers manually. Important Safety Guidelines

Download and install the on your computer. Restart the PC if prompted.

The tool is designed to be a bridge between a Windows computer and your MediaTek Android device, providing a simple execution method to flash custom or stock ROMs easily.

Press and hold the Volume Down or Volume Up key (depending on the specific phone model) to force Preloader mode.

Turn off your MediaTek smartphone or tablet completely. Remove the battery if it is removable. Do not turn the device back on.

Visit the main SP Flash Tool thread on XDA. Search for “SP Flash Tool v5.1420 XDA” – users provide direct, clean downloads.

Possibly, if the preloader is corrupt but the BROM is intact. You’ll need to use the Format All + Download option and have a full firmware + preloader file. If the battery is physically dead, no tool can help.