As mentioned on the other thread, this morning (IIRC 9:20a) T-Mobile dropped B41 here, adding the 40 MHz previously allocated to the n41 secondary carrier, bringing that to 80 MHz. Theoretically there's another 10 MHz here but B41 is completely offline from what I can tell so TBD if we'll ever see that.
On the T-Mobile side of things, as of probably 9:20am this morning Austin is now 100+80 MHz n41; B41 is now gone. I can now hit 750ish Mbps indoors a half mile from the cell site, and wouldn't be surprised to break 1.5 Gbps closer/outside.
So TMo now has 10x10 n25 + 15x15 n71 + 100+80 n41 here, for a total of 230 MHz 5G. With the C-Band they'll have 270.
Re: 800, the band class is wrong for anything other than B26 LTE and n26 NR. Though I wouldn't be surprised if T-Mobile could throw Ericsson and Nokia enough cash to add band 26 support to their existing gear, so we *could* see B/n26 come back if there's nothing better to do with the spectrum. B26 probably makes more sense as that would allow for dropping B71 LTE everywhere with negligible coverage drops.