Many network providers lock their branded routers to their own SIM cards. If you want to use a SIM card from a different carrier in your MF293N, you'll need to unlock it. Using unofficial methods or third-party services can be risky, so you should only use official or highly trusted sources.
Locate the line labeled or Software Version . Methods for Updating ZTE MF293N Firmware Method 1: Online OTA (Over-The-Air) Update (Recommended) zte mf293n firmware
Ensure you have a stable internet connection. If it fails repeatedly, try a wired connection to the router via Ethernet. Many network providers lock their branded routers to