Official firmware images are rarely released to the public, and flashing custom options like OpenWrt is difficult because the WebUI doesn't support third-party images. Most "hacking" involves physical hardware mods, such as soldering onto UART pads to extract data.
ftp://ftp.zte.com/pub/Consumer/5G CPE/MC888/ zte mc888 firmware work
Find public files in Google Drive
"At the end of the day though, it's just a really nice car that doesn't make people
feel bad about how nice it is."