[eric12341]

@gTen it says it at the very bottom of that article, see:

Editors Note: Just to clarify for everyone who may ask, T-Mobile’s original LTE rollout will be theoretically capable of 72Mbps. The ability to software update the network to LTE 10 allows for T-Mobile to easily upgrade their network to much faster speeds with more backhaul. LTE 10 has a theoretical max of 150Mbps. For what it’s worth, our main spectrum guru Conan Kudo tells me that HSPA+ is really more network efficient than LTE up until release 10.