A: New firmware may have reset your MTU (from 1500 to 1492 for PPPoE) or disabled hardware NAT. Go to Advanced → NAT and re-enable CTF (Cut-Through Forwarding) .
Have you updated your ZTE F670L firmware recently? Share your experience and any tips you've learned along the way in the comments below! zte f670l firmware update upd install
Updating the firmware typically involves using the device's web management interface to upload a specific system file. Because this model is often distributed by Internet Service Providers (ISPs) , updates are frequently pushed automatically via TR-069 remote management. ⚡ Firmware Update Process A: New firmware may have reset your MTU