At Goldman Sachs' Communacopia Conference Thursday, T-Mobile EVP and CFO Neville Ray announced that T-Mobile has purchased spectrum licenses covering most of the state of Montana from cable operator Charter Communications. The licenses (colored red in the map above from Allnet Insights & Analytics) cover over an area of 120,000 square miles with a population of 600,000. The licenses are in LTE band 12, which is supported by two thirds of the phones currently in use on T-Mobile, according to Ray. They include the cities of Billings (pop 452,048) and Great Falls (pop 164,967), neither of which currently have T-Mobile coverage
One they are built out, the new licenses should greatly expand T-Mobile's coverage in Montana which is currently limited to a small portion of Western Montana as shown in the map below.
Ray said that T-Mobile's LTE network now covers 312 million people, including 215 million who are covered by 700 MHz band 12, which has superior building penetration compared with T-Mobile's legacy 1700 and 1900 MHz spectrum. He said T-Mobile has band 12 spectrum covering another 269 million people to build into and that the carrier's band 12 buildout will continue over the next 12 months. Ray also revealed that T-Mobile is the global leader in the percentage of calls (60%) carried over VoLTE.
Sources FierceWireless, TmoNews, Reddit. Images: T-Mobile, Allnet Insights & Analytics