Tether app don't update firmware correctly with Archer NX200 V1 or V2. 

See the attachments. For hardware version 1, the firmware should be updated to version 1.8.0, and for hardware version 2 to 1.3.0, but the application shows versions 1.7.0 and 1.2.0 as the most current for each hardware version.

And, finally, another important point would be the ability to update the firmware remotely, or at least by connecting to the router through the VPN.