Band 12 on TMobile S6 never seen so far

[stardomains]

I've used my t mobile samsung s6 galaxy for 2 months now and I haven't seen LTE band 12 being used yet. I had an Alcatel vital pop3 and on that I saw band 12 used quite a bit when I used it on tmobile. Has anyone seen band 12 being used on their tmobile branded galaxy s6? I use an app that tells which band is in use.

 

[stardomains]

I was deep in the bowels of a building in Astoria Queens NYC the other day and previously I had a Alcatel Idol 3 in which I received band 12 LTE.

Well good news is the TMob Galaxy S6 did receive this signal there too: