Spreadtrum drivers are not always digitally signed by Microsoft, which causes Windows to block them. You must install them correctly.
Here is a solid, step-by-step guide to installing and troubleshooting the driver. spreadtrum sci usb2serial ok
: Right-click the Start button and select Device Manager . Spreadtrum drivers are not always digitally signed by
: Select "Browse my computer for driver software" and then "Let me pick from a list of available drivers on my computer." spreadtrum sci usb2serial ok
: Enables serial communication between the PC and the device's chipset for low-level debugging. Troubleshooting "Not OK" Status
Check physical connection
: Click Have Disk and navigate to the folder containing your extracted Spreadtrum drivers. Select INF : Look for the file named SCIU2S.INF .