T-Mobile US is doing some massive network upgrades right now and some phones can display this information in the deeper settings of the phone. People are reporting great jumps in network speeds in the past 2 weeks and noticing the configuration have increased. I've gone into the settings under *#*#4636#*#* and *#*#7378423#*#* but didn't see anything specific on what is actually deployed by the cell company and being used by the phone.
I'm using a T-Mobile branded Xperia Z phone but the software is generic c6603 android 4.4.2, build 10.5.A.0.230. In case that info is needed to answer the question.
Thanks for any suggestions.