This is the easiest and recommended method for most users.
Firmware is the operating system of your router. It controls how the hardware interacts with the cellular network, manages Wi-Fi protocols, and handles the user interface. The MF971RS is a robust device, but its capabilities are entirely dependent on the version of the software installed. zte mf971rs firmware
Research into the firmware has identified several critical security flaws that were patched in later versions: CVE-2021-21748 This is the easiest and recommended method for most users
If OTA fails or you have a downloaded .bin or .zip file, follow this manual process. manages Wi-Fi protocols
Connect via Ethernet cable (Wi-Fi flashing is risky). Disable all other network adapters on your PC.