The MF65M was a great 3G hotspot in 2014-2017. In 2025-2026, it's obsolete for 4G use. Upgrade the hardware, not the firmware.
I’ve seen this question pop up a lot: "How do I upgrade my ZTE MF65M to 4G?" zte mf65m upgrade to 4g
However, here is the community answer explaining your real options. Posted by [Your Name] – Mobile Hotspot Enthusiast The MF65M was a great 3G hotspot in 2014-2017