Latest V9.0 config files often use payload type 6, requiring specific config-utility tools for decryption.
4 Gigabit Ethernet (GE) LAN ports, 1 POTS port (Voice), 1 USB port. Antennas: 4x 5dBi external antennas. Zte F670l V9-0 Firmware
[Feature] Enabling Telnet on ZTE firmware with post ... - GitHub Latest V9
Many F670L units are locked by ISPs, preventing manual firmware updates without authorized credentials or a modified config.bin . 1 POTS port (Voice)