Why are we here, What are we striving for?

: Specifically, version R4.20.0201 or similar is often recommended to ensure the PC recognizes the device in preloader mode.

The SPD Flash Tool R400001 is a Windows-based application that allows users to flash firmware packages, including ROMs, kernels, and other software components, onto Spreadtrum-powered devices. The tool supports a wide range of Spreadtrum chipsets, including SC7731, SC9832, SC8830, and many others.

: Upgrade the device to a newer version of Android or a more recent security patch.

This works when timing is the issue.