SP Flash Tool v5.1824 (or close to v4.8.0) Download and Usage Guide: A Helpful Blog Post
Community Forums: 4PDA and Hovatek provide extensive lists of versions alongside troubleshooting guides for common errors. sp flash tool v480 download link
Battery Charge: Ensure the device has at least 50% battery or is connected via a reliable USB cable. Basic Usage Guide Launch: Open flash_tool.exe as an Administrator. SP Flash Tool v5
User Interface & Usability:
SP Flash Tool v5.2404: The most stable version for a broad range of mid-tier and older devices. Review of SP Flash Tool v4
Disclaimer: Flashing custom firmware or stock ROMs involves risk. This guide is for educational purposes. Ensure you have backed up your data. The author is not responsible for device bricks or data loss.