Extract the downloaded .zip or .rar archive to a dedicated folder on your desktop using 7-Zip or WinRAR.
Limitations and complications
Hold down the on your keyboard while clicking Restart in the Windows Start Menu. Your PC will reboot into the blue Choose an option menu. spreadtrum sci usb2serial ok
Power and mode
3. Device Manager shows "SPRD U2S Diag" instead of "USB2Serial" Extract the downloaded
Press and hold the (usually Volume Down, Volume Up, or both depending on the device). or both depending on the device).