wrt t-mobile 1900 Ghz markets I found this document:
Network Evolution | Support
Which lists the Tampa, Orlando and Providence RI markets as modernized with 1900 support. Those are the primary markets I where I will use the phone.
I also found this document which lists the current LTE markets:
4G LTE Coverage | Support
Which is VERY small.
So, I would probably be fine with not having the 1700/2100 supported phone.
However, at this point I am highly thinking of just switching to the Nexus 4. I like the idea of stock android and the plethora of ROMs... (and at $349 vs $570) also there is a known hack to turn the non-certified LTE radio on. Also, it has the 1700 so would support the nationwide HSPA+ 42 of tmo which I have read can be as fast or even better than LTE in some places.
Argh... decisions/decisions. Has anyone compared the Nexus 4 to the HTC One side by side... the specs seem highly similar. Or is this the wrong thread to ask that?