Dual-band operating concurrently at 2.4 GHz (802.11n) and 5 GHz (802.11ac).
| Problem | Likely Cause | Verified Solution | | :--- | :--- | :--- | | | OLT compatibility mismatch. | Re-enter LOID/SN via Network → Remote Management → EPON Authentication . | | Wi-Fi disappears (5GHz not visible) | Country code reset to default (China). | Go to Wi-Fi Advanced → Set region to your country (e.g., US, BR, AU). | | Login password rejected | Firmware reset credentials. | Hard reset (30/30/30 method): Hold Reset for 30 seconds, unplug 30 seconds, plug while holding reset 30 seconds. | | LAN ports work but WAN down | VLAN tag missing. | Add VLAN (e.g., 10, 100, 1010) under WAN Service → Internet (Route) . | zte zxhn f670l epon firmware verified
: Supports 802.11ac (5GHz) and 802.11n (2.4GHz) concurrently, reaching speeds up to 1.2Gbps. Dual-band operating concurrently at 2
ZTE devices are notorious for hardware changes. A firmware for hardware might not work on V5.0 hardware, even if the model number is the same (F670L). Check the sticker on the bottom of your router. | | Wi-Fi disappears (5GHz not visible) |
Look for firmware labeled as "Global" or "English" to ensure EPON compatibility if you are using it on a non-standard network.
: V1.1.10P1N2E is a documented firmware version for this model, though it has been flagged for historical input verification vulnerabilities (CVE-2020-6879).