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 .
Select "Browse my computer for drivers" and point it to the extracted folder containing the .inf files (e.g., sciu2s.inf ) . spreadtrum sci usb2serial ok
While the Spreadtrum SCI USB2Serial driver is generally reliable, users may encounter issues during installation or use. Some common issues and their solutions include: Some older servicing tools cannot communicate with COM
Check physical connection
Once the drivers are configured, verify the hardware handshake using this exact sequence: While the Spreadtrum SCI USB2Serial driver is generally
If you see "SCI USB2Serial OK" in a flashing tool, it means the handshake between the PC and the phone's bootloader was successful . If the connection fails: