Wi-Fi Protected Setup (WPS) is a known security liability. In V9.0, go to Wireless > WPS and disable it completely.
Username: admin , Password: admin or 1234 . Zte F670l V9-0 Firmware
: Many V9.0 units are deployed with ISP-specific firmware that locks out "Administrator" settings, preventing users from editing SSIDs, filtering MAC addresses, or performing manual firmware updates. Telnet Access : Recent builds (e.g., F670L V9.0.11P1N52 Wi-Fi Protected Setup (WPS) is a known security liability