Here is what you get after a successful upgrade:
The ZTE ZXHN F670L is a EPON (Ethernet Passive Optical Network) Optical Network Terminal (ONT) with integrated routing and Wi-Fi (typically AC1200 or AC1900 class). It is widely deployed by Internet Service Providers (ISPs) across Asia, Latin America, Eastern Europe, and the Middle East. zte zxhn f670l epon firmware exclusive
The term "firmware exclusive" refers to the fact that ZTE does not release public, universal firmware for this model. Instead, every firmware build is customized and locked to a specific ISP or regional distributor. Here is what you get after a successful
The F670L is built on a specialized Broadcom chipset designed for optical throughput. The firmware sits on top of this hardware, managing the transition from the optical signal to standard Ethernet and Wi-Fi. Instead, every firmware build is customized and locked
dd if=/dev/mtd0 of=/tmp/full_backup.bin