Updating the ZTE MF79U firmware is a straightforward process. Here's a step-by-step guide:

Access more settings, such as APN configuration, SMS management, and network band selection. 3. Pre-requisites for Flashing Firmware

Before attempting to flash "full" firmware, ensure you have the following: Driver Installation: Install the ZTE LTE Serial Drivers

I can provide specific troubleshooting steps or guide you to the exact repair utilities needed.