Official firmware for ZTE devices is primarily distributed through two channels:
download firmware meant for the F660, F680, or F670 (non-L version). zte zxhn f670l firmware download
Before looking for a download, identify what version you are currently running. Official firmware for ZTE devices is primarily distributed
Call/chat with your ISP’s tech support. Ask: “Please send me the latest validated firmware for the ZXHN F670L for my region.” They may push it remotely. zte zxhn f670l firmware download