Spreadtrum Communications (now UNISOC) manufactures low-cost mobile chipsets. Unlike standard Android devices that use ADB (Android Debug Bridge) or Fastboot interfaces, SPD devices require a low-level serial communication interface (SCI) to interact with the device when it is powered off.
Powering hundreds of millions of low-cost mobile devices globally.
Modern versions of Windows (10 and 11) block unsigned drivers by default. spreadtrum sci usb2serial ok
Click , browse to your extracted folder, select the .inf file (e.g., SciU2S.inf ), and complete the installation wizard. How to Get the "SCI USB2Serial OK" Status in Flash Tools
Here’s a technical breakdown and observational text regarding (often seen as spreadtrum_sci or sprd_sci in Linux/dmesg logs): Modern versions of Windows (10 and 11) block
You are ready to flash.
Troubleshooting Your Spreadtrum Connection: A Guide to the SCI USB2Serial Driver Troubleshooting Your Spreadtrum Connection: A Guide to the
Some older servicing tools cannot communicate with COM ports numbered higher than COM9 . If Windows assigns your driver to COM12 or COM25 , open the driver properties in Device Manager, navigate to Port Settings > Advanced , and manually change the COM Port Number to an unassigned value between COM2 and COM8 .
Many versions of this driver are not digitally signed by Microsoft. Modern Windows versions (7, 8, 10, and 11) will block them by default. Go to > Update & Security > Recovery . Under Advanced startup , click Restart now .