PIN and Password authentication of ZTE MF971V with curl
Well, i wanted to login as fast as possible from terminal (and maybe automate things for later).
ZTE MF971V uses POST request for communication at "login screen", it basically needs X-Requested-From and Referer headers to work for some reason. All post requests goes to /goform/goform_set_cmd_process and returns json with result value.
Simply modify script for your values (you don't have to enter router password, if you want to only authenticate PIN), and run it. As simple as that!