Wait quietly. The process takes 3 to 5 minutes. The device will automatically reboot once completed. Do not refresh the browser page or unplug the power cable during this time. Common Firmware Issues and Troubleshooting 1. The Device is Stuck in a Reboot Loop (Bricked)

Log in using the default credentials found on the bottom sticker, or try standard administrator credentials like admin / admin or telecomadmin / admintelecom .

Firmware updates patch known vulnerabilities in the web management interface, protecting the device from malicious local or remote exploits.

H -- Yes --> J[UART Serial Console<br>or SPI Flash Programmer] J --> E

Click . Do not refresh the page, unplug the cable, or turn off the device.

| Version | Model | Notes | |-------------------|----------|-----------------------------------------------------------------------| | V2.0.0P1T1 | F601 | Early release; insecure default root password. | | V5.0.10P1T5 | F601 | Stable bridge mode; no known major bugs. | | V6.0.10P2T2 | F601 | Improved OMCI compatibility with Huawei OLTs. | | V7.0.0P1T1 | F601 | Removes telnet; forces OMCI-only mgmt. | | V5.0.20P1T1 | F601W | WiFi stability fixes; fixed WPA2 KRACK vulnerability. | | V6.0.10P6T3 | F601W | Adds WPA3 (limited support). |

Because the ZTE F601 acts as a bridge, it will not assign your computer an IP address automatically via DHCP. You must configure your computer's network card manually: 192.168.1.100 Subnet Mask: 255.255.255.0 Default Gateway: 192.168.1.1 Step 3: Log In via Browser

Try accessing 192.168.1.254 or 192.168.0.1 . If that fails, perform a factory hardware reset by pressing and holding the recessed Reset button on the side of the unit for 10 seconds while it is powered on. Conclusion

Go to System Management > User Management (or similar) and select Backup Configuration . This allows you to restore your settings if the update resets the device. Upload Firmware: Go to Management > Software Upgrade .

Connect a computer directly to the ZTE F601 LAN port using an Ethernet cable.