This is the trickiest part. ZTE does not host consumer firmware on a public download portal. Instead, firmware is distributed via:
Before we discuss firmware, let’s quickly recap the hardware. The ZTE MF79U is a Category 4 LTE USB dongle supporting download speeds up to 150 Mbps and upload speeds up to 50 Mbps. It features a MicroSD card slot (up to 32GB), an external antenna port, and plug-and-play compatibility with Windows, macOS, and Linux. zte mf79u firmware