Use the original USB cable that came with the phone.
Always backup your current firmware before flashing, and never flash someone else’s preloader unless you’re 100% sure it’s compatible. sp flash tool 480
There is no scientific paper or legitimate technical documentation for "SP Flash Tool 480" because the software does not exist in an official capacity. Always download the tool from reputable sources (like the official MTK repository or trusted Android development forums like XDA Developers) and ensure you are using a verified major version (like v5 or v6). Use the original USB cable that came with the phone