There are three methods to update firmware. Do not skip preparation.
Some custom firmwares set a default password like password or zte123 . If locked, perform a hardware reset (pin hole for 15 seconds). Zte Mf920u Firmware
What specific issue are you having with your ZTE MF920U? If you tell me if you're trying to , fix a bricked device , or access advanced settings (like TTL/IMEI) , I can give you the right firmware files and steps. ZTE MF920U 4G Mobile WiFi | Unboxing & Spec Breakdown There are three methods to update firmware
: Protecting your data from unauthorized access and vulnerabilities. Performance Stability fix a bricked device