I have been having issues connecting streaming boxes and sporadic issues with connectivity to a lot of Websites on my PC when I use T-Mobile Home internet and the new gray cylindrical 5G router.
I got a call back from Tech Support at T-Mobile and they explained that these new routers support ipv6 ONLY, they are locked in ipv6 ONLY mode and cannot be changed by the user at this time. They are working on letting users choose ipv4 AND ipv6 protocols but cannot do that yet, perhaps soon they will.
That is the source of the flakyness and unreliability of T-Mobile Home internet in my case, using PC’s and some devices. Mostly it works fine, but its just flaky and at times you just will lose a connection in one tab of the browser while connections are fine in the same browser in a different tab.
Just thought people might want to know in case you are having similar issues.