ZTE does not provide a single universal firmware file. The correct update depends on your carrier/region (e.g., AT&T, Telstra, T-Mobile, Smart, Vodafone) and hardware version (MF920U is typically v1.0 or v2.0).
To update the firmware on your mobile hotspot, you can use the built-in online update feature through the web management interface. ZTE Official Website How to Update Firmware Online Connect to your hotspot: Join the Wi-Fi network of the ZTE MF920U with your computer or phone. Access the web interface: Open a browser and enter zte mf920u firmware update
Would you like a step-by-step guide for a specific carrier version (e.g., AT&T, Telstra, or Global unlocked)? Note: ZTE does not provide a single universal