T-Mobile Offers Progress Report On Wideband LTE Rollout
So AT&T it's the only one not using this kind of marketing gimmicks?
They just say they have the strongest signal or something like that.
They are doing carrier aggregation in select cities like Chicago, where...
this information is incorrect
As for NYC, while tmo owns a 700Mhz license in that market, that spectrum is unusable due to the presence of TV channel 51. It will probably be 2017 or later before that channel is moved thus allowing tmo to utilize their 700Mhz spectrum in that market (i.e after the incentive auction).