Updates often introduce improved parental controls, better QoS (Quality of Service) management, and upgraded encryption standards (like transitioning from WPA2 to WPA3 if supported by the hardware revision). How ZTE F670 Firmware Updates Are Distributed
Connect your computer to the router via an Ethernet cable for a stable connection. ZTE F670L V1.1 & V9.0 Configuration Guide | PDF - Scribd
Click to see if your ISP has an available OTA (Over-the-Air) update.