SPD Research Tool allows you to flash the stock firmware (PAC) on Spreadtrum/Unisoc Powered Smartphone, Feature Phone, and tablets.
Here on this page, we have managed to share the latest version along with the previous versions of the SPD Research Tool.
Features of SPD Research Tool
It comes with an easy interface, which allows you to quickly select the stock firmware just by clicking on the Load Firmware button. It also allows you to access the settings of the Tool, which includes Flash Operations, Multi Languages, LCD Configure.
Flash Stock Firmware:
It allows you to flash the .pac based stock firmware on Spreadtrum/Unisoc Chipset powered Smartphone and Tablets. The tool can be convenient and useful than the SPD Upgrade Tool.
It allows you to flash the Stock recovery on your Spreadtrum/Unisoc Devices. You can also flash the custom recovery or any root package on your Spreadtrum device.
It allows you to choose the multi-language of your device (may need special NV file), Configures the LCD settings (may need user image file), MCP type, Volume Frequency Tuning, Read Active Flash, Erases Active Flash, Writes Active Flash.
Download SPD Research Tool (Spreadtrum)
SPD Research Tool is compatible with all versions of Windows OS, including Windows XP to Windows 10 (x32 or x64 bit). If in case you were looking for the latest version of the Research Tool, then use the following links to get it on your computer:
R24.0.0003: SPD_Research_Tool_R24.0.0003.zip – Latest
 How to Use: If you want to learn to use the Research Tool to Flash Stock firmware, then head over to How to use SPD Research Tool page.
 How to Write IMEI: After flashing (installing) the stock firmware on Spreadtrum Device, you may need to flash (install) the IMEI. To flash the IMEI on your Spreadtrum device, checkout the WriteIMEI and Read&Write Tool.
 Credits: Research Tool shared on this page is made available by Unisoc Communications. So, full credit goes to them for the sharing the tool for free.