Here are the most significant firmware milestones of 2021:

: Some users reported that older firmware versions (like B09) were more stable than later updates (like B12), which occasionally introduced DNS issues or broken Bridge Mode. How to Manage Your Firmware

Ensure the Access Point Name (APN) settings match your network provider.

In 2023, ZTE disclosed several vulnerabilities affecting the MC801A, including:

Using older firmware means missing out on the latest security patches against modern web exploits. How to Check Your Current Version

During 2021, the MC801A was a primary 5G CPE for many global carriers (like Three and Elisa). Official Manuals ZTE MC801A Service Manual

Units bought directly from retail channels feature ZTE's stock global firmware.

Before updating the firmware:

Secure the power cable to prevent accidental shutoffs.

Download the correct firmware .bin file from the ZTE Support portal (ensure you match the specific model and carrier).

While 2021 saw progress, it was also when users first began reporting problems. While many issues became more widespread with later updates like B12, the seeds were sown in this period, and users frequently referenced 2021 as a reference point for performance and problems.

Connect your computer or phone to the ZTE MC801A via Wi-Fi or Ethernet.

By the time 2021 rolled around, user pressure mounted. Firmware updates released between January and December 2021 were not incremental—they were transformative. They addressed core stability, introduced new network toggles, and in some cases, unfortunately, removed features users loved (most notably, bridge mode).