Converting files to a .pac file is a common task when building firmware for Spreadtrum (SPD) or Unisoc-based mobile devices. The .pac format acts as a container for various partition images (like boot.bin , system.bin , or recovery.img ).
Click and wait for the tool to compile the binaries. The log window will display a "Success" message when finished.
Converting a .bin (binary) file to a .pac (Spreadtrum/SPD Firmware Package) file is a critical procedure for Android and feature phone technicians aiming to repack, customize, or restore firmwares, particularly for devices utilizing chipsets. A portable solution is ideal, allowing you to perform this action directly from a USB drive without installation.
module specifically for creating Spreadtrum-compatible packages. SPD Upgrade Tool how to convert bin file to pac file portable
Open the folder and locate the main executable ( ResearchDownload.exe or UpgradeDownload.exe ). Step 2: Open the Packet Creation Interface Launch the executable file.
Right-click ResearchDownload.exe and select (if permissions allow) to launch the program.
format, you may need a firmware extractor to pull individual partitions (boot, system, etc.). Load into Research Tool : Open a tool like Research Download and load the required files first. : Assign your files to their respective slots (e.g., for the boot logo). Build Packet Converting files to a
This doesn't convert but helps locate proxy IPs/ports for manual PAC creation.
Because a PAC file requires isolated partition images, you must first break down the monolithic BIN file.
Ensure your source .bin file is a complete, uncorrupted read of the target device's firmware. The log window will display a "Success" message
: While the tools are portable, you must still have the Spreadtrum USB Drivers installed on the host computer for the device to be recognized during any subsequent flashing.
Run the command: pac7tool.exe make [your_file_name].pac config.xml
: The official Spreadtrum/Unisoc tools are portable by design. You can download the latest version from repositories like SPD Flash Tool Infinity CM2 SPD
Because PAC files contain complex partition tables and configuration parameters unique to the Spreadtrum chipset architecture, you cannot simply change the file extension from .bin to .pac . Doing so will corrupt the package and potentially brick your mobile device.