Official firmware is rarely hosted publicly by ZTE for end-users. The most reliable sources for the MC801A community are:
Always try OTA updates or a factory reset first. If you must flash, use the hidden getphonekey interface with verified firmware for your exact hardware version. Keep a TFTP recovery plan ready. And never, ever unplug the power mid-flash. zte mc801a firmware flash
For advanced users who need to recover a bricked device or install a specific firmware version not available via OTA (Over-The-Air), ZTE provides a dedicated . Official firmware is rarely hosted publicly by ZTE