The ZTE F668 is a versatile GPON terminal often used for fiber optic internet and VoIP services. Over time, you might need to restore it to its original factory state to clear custom configurations, fix misconfigured settings (like Wi-Fi or bridge mode), or troubleshoot connectivity issues before selling or returning the device.
Use this method if you can still log into the router's management page. How to Reset Factory Settings on ZTE F668
Disclaimer: This guide is for informational purposes. Modifying router settings may void your ISP warranty. Perform these steps at your own risk. The ZTE F668 is a versatile GPON terminal
If your ZTE F668 was provided and managed by an internet service provider (ISP), a factory reset may temporarily disconnect you. Some ISPs lock the device to prevent resets. In that case, only the hardware button will work, and you may need to call support to reprovision the device. Disclaimer: This guide is for informational purposes
After a successful reset, your device will have these defaults: