: A copy of your device's original firmware (specifically the pac file or separate bin / tar configuration files). Step-by-Step Guide to Writing IMEI
While V4.1 was popular for older Spreadtrum devices, newer tools have largely superseded it for modern UNISOC chipsets: Spreadtrum Imei Tool V4.1
Spreadtrum IMEI Tool V4.1 is a specialized software utility designed to rewrite, repair, or backup the International Mobile Equipment Identity (IMEI) numbers on mobile devices powered by Spreadtrum (now known as Unisoc) processors. Version 4.1 is widely regarded as one of the most stable and user-friendly releases in the tool’s history. : A copy of your device's original firmware
Runs as a portable executable without requiring heavy installation packages. System Requirements Spreadtrum Imei Tool V4.1