NCK Dongle Spreadtrum Module v1.9 is a professional service tool designed for diagnosing, flashing, and repairing mobile devices powered by Spreadtrum (SPD) and UNISOC chipsets.

: Technician forums and software hubs often host direct links, such as this Google Drive download link for v1.9

Select Generic CPU > Select Loader with "Simlock" in name > Execute in only (Diag Mode is not supported for these operations in v1.9).

: Proper Spreadtrum/UNISOC USB drivers must be installed on your computer for the software to recognize the connected mobile device. Official NCK Box Support

The is the NCK Dongle Support Portal (via the NCK Box Setup application). Here is the legitimate process: