A PAC file is a type of firmware package used for flashing Nokia devices. It contains the necessary files and instructions for updating the device's software, including the operating system, applications, and configuration settings.
Install the Spreadtrum/Unisoc USB drivers so your PC can "talk" to your phone. A Reliable USB Cable: nokia ta1304 flash file pac file
Run the SPD Upgrade Tool (e.g., ResearchDownload.exe or UpgradeDownload.exe ). A PAC file is a type of firmware