If you cannot find the update option in the user menu, it is likely hidden. ISPs often update these devices remotely via the OLT (Optical Line Terminal) server. You cannot perform this yourself; your ISP must push the update remotely.
Ensure your computer is connected to the router via Ethernet cable or Wi-Fi. IP Address: Open a browser and type 192.168.1.1 192.168.0.1 into the address bar. Credentials: Common default logins include: Zte F670 Firmware Update
: Plug your computer into a LAN port using an Ethernet cable (avoid Wi-Fi for updates). : Open a web browser and enter 192.168.1.1 Credentials If you cannot find the update option in