: The F670 series generally does not support OpenWrt or other third-party firmwares due to proprietary hardware drivers. 🔍 Advanced Technical Research
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.
Before you start, log in to your router and save a backup of your configuration. This ensures you can quickly restore your Wi-Fi name, password, and other settings if the update resets the device. 2. Access the Admin Interface
The (commonly referred to as ZTE F670) is a high-performance GPON/EPON Optical Network Terminal (ONT) widely deployed by Internet Service Providers (ISPs) such as Telmex, Claro, Vivo, TIM, and various regional carriers. It combines a fiber optic modem, router, and VoIP gateway into a single unit.