Zte F680 Firmware Upgrade

The router, now running firmware v5.2.1, displayed a clean status: [OK] All systems nominal.

ZTE produces multiple revisions of the F680. The firmware for a F680 V1.0 is compatible with a F680 V6.0 . Look at the sticker on the bottom or back of the device. zte f680 firmware upgrade

Ensure the firmware is specifically compiled for the F680 hardware revision. Using firmware for the F660 or F670 series will render the device inoperable. The router, now running firmware v5

Run a hardwired speed test (Ookla or Fast.com). You should see expected up/down speeds. A downgrade in speed usually indicates wrong VLAN settings (re-enter ISP config). now running firmware v5.2.1