in the "Check New Version" section to search for available patches. Offline/Tool-Based Updates
| Version | Carrier / Region | Key Changes | |---------|-------------------------|-----------------------------------------------------------------------------| | B06 | Early stock (Three UK) | Initial release, unstable for some. | | B09 | Three UK / Generic | Fixed random reboots, improved Wi-Fi 2.4 GHz stability. | | B12 | Optus / Australia | Added IPv6 support, better 5G SA (Standalone) compatibility. | | B13 | Three UK | Introduced band locking (hidden menu), fixed SMS issues. | | B15 | EU generic | Improved VPN passthrough, reduced latency. | | B19 | T-Mobile / Austria | Patched CVE-2023-26909 (security hole), added bridge mode. | | B20 | Latest Three UK (2024) | Full 5G SA support, UI speed improvements, DNS over TLS. | zte mc801a firmware update
The most notorious issue with early MC801A firmware (versions B04, B05, and B08) was the DNS bug. After 24–48 hours of uptime, the router would stop resolving domain names. Websites would hang, and apps would fail to load. A firmware update to B12 or higher replaced the buggy DNS relay with a stable alternative. in the "Check New Version" section to search
acting up? Before you call tech support or consider a new device, there is one simple "housekeeping" task you shouldn't overlook: a . | | B12 | Optus / Australia |
This is the safest method, as ZTE pushes updates approved by your mobile carrier.
: Addresses known issues such as DNS errors or hardware failing to hold 5G signals.
This guide provides a comprehensive walkthrough for updating your ZTE MC801A firmware through various methods. Why You Should Update Your ZTE MC801A Firmware