If your device is unlocked and you have obtained the correct firmware file (often labeled as versions like ), follow these steps: www.ycict.net ZTE F670L V1.1 & V9.0 Configuration Guide | PDF - Scribd update file and click on Update. Update. ZTE ZXHN GPON ONT F670L User Manual
In short: the right firmware turns a functional ONT into a . zte zxhn f670l firmware download hot extra quality