Try the default factory passwords printed on the bottom sticker of the unit. Broadband Dynamic IP (DHCP) Not Working The V9.0 upgrade may have deleted your VLAN profiles.
If you want, I can:
Do not use the standard GUI. The “easy” upgrade page is often limited. Instead, navigate to: http://192.168.1.1/cgi-bin/upgrade.asp or http://192.168.1.1/getpage.gch?pid=1002&next=upgrade.html zte f670l v9 0 firmware download full
Note: Always verify the MD5 or SHA256 checksum of downloaded binaries against community logs to ensure the file hasn’t been injected with malware. Step 3: Step-by-Step Firmware Flashing Guide
Never flash firmware over Wi-Fi. Connect your computer directly to LAN Port 1 of the ZTE router using an Ethernet cable. Step 2: Where to Safely Download ZTE F670L V9.0 Firmware Try the default factory passwords printed on the
Contact your internet provider to see if they offer an over-the-air (OTA) update. Community Sources (Third-Party)
Access the web interface at 192.168.1.1 (or the IP listed on your router). Navigate to Administration or System Management and download your current configuration file. The “easy” upgrade page is often limited
Fixes known vulnerabilities, closing backdoors against unauthorized remote access.