Pd1731-a-1.8.7 — Flash File
The (also known as stock ROM or firmware) is a compressed package containing the system image, bootloader, recovery, kernel, and other low-level partitions necessary to restore a device to its factory state.
A text document mapping the memory layout of the MediaTek processor. Pd1731-a-1.8.7 Flash File
Newer Unisoc (Spreadtrum) chips implement authentication to prevent unauthorized flashing. You would need a custom “auth bypass” tool (e.g., Unisoc Android Utility) or a paid service like UnlockTool. The (also known as stock ROM or firmware)