Go back to > Developer Options and toggle USB Debugging to ON.
Once your driver works, keep these best practices to avoid future disconnections: coolpad usb driver
If you see unauthorized , check your phone and accept the RSA key fingerprint. Go back to > Developer Options and toggle
Fastboot uses a different VID/PID. Manually force the driver in Device Manager: When the phone is in Fastboot mode, select “Android Bootloader Interface” instead of “Android ADB Interface.” or use a universal driver?
There is a common confusion: Should you download the official Coolpad driver from a sketchy third-party site, or use a universal driver?