If you simply want to change settings like bridge mode or disable Wi-Fi, do flash full firmware. Instead, use Telnet or configuration file editing, which are far safer on the ZTE F670L V9.0.
Interrupting the power or flashing an incompatible firmware variant (e.g., flashing V9.0 software onto a V6.0 or V8.0 hardware revision) will permanently ruin the device. zte f670l v9 0 firmware download full
The quest for a "full download" is fraught with technical peril. Firmware is often region-locked hardware-revision specific If you simply want to change settings like
Outdated browser cache displaying the old interface framework. do flash full firmware. Instead