If your internet isn't working post-update, use the "Restore Configuration" feature in the Management menu to re-upload the backup you made in Step 1. 5. Why Should You Update?
Some ISP firmware hides the upgrade page. Try accessing directly: http://192.168.1.1/cgi-bin/upgrade.asp or http://192.168.1.1/getpage.gch?pid=1001&submenu=Advanced&menu=Update
Failing to follow these precautions can permanently brick your router. Treat these steps as mandatory:
remains a reliable, fast, and secure gateway to the internet.
ZTE-F680-UP-2024-001 Date: April 12, 2026 Author: Network Operations Team Equipment: ZTE F680 (GPON ONT) Firmware Version (Pre-update): V6.0.10P1T1 Firmware Version (Post-update): V6.0.10P4T2
If using an unbranded, retail version of the ZTE F680, visit the official ZTE Support website.
This is the simplest method if your internet service provider (ISP) allows for automatic firmware polling. Access the Admin Page
| Problem | Likely Cause | Possible Solution | | :--- | :--- | :--- | | | ISP controls updates; you are on the latest version supported for your model. | The router is likely up-to-date. Contact your ISP to confirm. | | Update fails or gets stuck | Interrupted internet connection, corrupted firmware file, or power outage during the process. | Do not turn off the router. Try the process again. If it is stuck for a long time, a factory reset may be required. | | Router won't power on after update | The update was interrupted, or the wrong firmware was used. | This is serious. Unplug the router for 30 seconds and try again. If it still won't boot, you will likely need to contact your ISP or ZTE support for a potential replacement. | | Need to force restart | The router has become unresponsive. | Press and hold the Power button for 15 seconds or until the device restarts. |