Once you have obtained a valid firmware file (usually a .bin or .trx file), follow this procedure:
: For those looking for the v9.0 "Standard" web interface, community-shared links such as this ZTE F670L V9.0 Firmware (Google Drive) are available.
ZTE provides a tool called (often named ZXHN F670L upgrade tool.exe ). This is commonly bundled with firmware files on technical portals. However, these portals require a partner login. As a consumer, you rarely get access.
However, if you are performing a manual configuration or recovery, here is a summary of available resources and a technical write-up for the process. Firmware Resources Official Support Portals : You can check the ZTE Support Site ZTE Enterprise Portal
trust random websites offering direct .bin downloads—they are either outdated, region-locked, or malicious. Instead, invest time in contacting your ISP’s Level 2 support or join a technical community where firmware files are shared with verified checksums.
If you are looking for a firmware link to manually flash the device, you are entering high-risk territory.
Most ISPs hide firmware updates behind support tickets or hidden URLs.