Achieving the coveted "OK" status requires installing the driver correctly. Since many Spreadtrum drivers are older and unsigned, standard Windows protections can sometimes block them. Step 1: Download the Correct Driver Package

Conflicting programs

Spreadtrum SCI USB2Serial port (COM/LPT/Serial) drivers

The primary use of the driver is to flash firmware using tools like the or ResearchDownload.exe . These tools rely entirely on the SCI driver to send the firmware image (usually a .pac or .pac.7z file) to the device's internal memory. If your device is stuck in a boot loop or has a completely black screen (commonly known as being "bricked"), this driver is your lifeline to restoring it.

AT+CPIN? AT+CREG? AT+CGMR (firmware version)