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Spd Upgrade Tool R4.0.0001 Updated Jun 2026
The tool should show a progress bar. Once it finishes, you will see a green "Passed" message.
: The tool cannot detect your phone without the correct device drivers installed on your PC. Step-by-Step Guide to Use SPD Upgrade Tool R4.0.0001
Once the tool’s user interface opens, click on the button (represented by a single gear icon in the top-left corner). A file browser window will pop up. Navigate to the directory where you extracted your device's stock firmware, select the .pac file, and click Open . The tool will take a few moments to unpack the script; wait until the firmware name appears in the top status bar. Step 3: Configure Settings (Optional)
A high-quality, data-sync-capable USB cable. Use a USB 2.0 port on your computer; USB 3.0 ports can occasionally cause driver recognition conflicts. spd upgrade tool r4.0.0001
Release the boot key as soon as the SPD Upgrade Tool detects the device and the progress bar starts moving. Step 7: Finalizing the Process
Click the button (represented by the square icon) within the tool interface.
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SPD Upgrade Tool R4.0.0001 is a lightweight Windows application designed specifically for flashing or installing .pac firmware (ROM) on mobile devices equipped with Spreadtrum (now part of Unisoc) chipsets. Often referred to interchangeably as the SPD Flash Tool, Spreadtrum Research Tool, or UniSOC Flash Tool, this utility is essential for:
While holding the boot key, connect the device to your computer using the USB cable.
Once complete, the progress bar will turn green, and the status column will read . Step-by-Step Guide to Use SPD Upgrade Tool R4
Download the official and the correct Stock ROM (.pac format) matching your exact device model.
The is a specialized, Windows-based flashing application developed by Unisoc Communications (formerly Spreadtrum). It allows service technicians and advanced users to install, upgrade, or downgrade factory stock firmware on mobile devices powered by Spreadtrum/Unisoc chipsets .
For a standard stock upgrade or repair, leave the default settings intact.