With T-Mobile's UNcarrier 9 movement likely having all to do with business accounts, it will be very interesting how T-Mobile's Legere, who has brought the company back from being an UNprofitable company to being the company that others in the wireless industry are emulating. I would put money on T-Mobile allotting all business mobile phones UNLIMITED 4G LTE data, talk, and text as well as expanding coverage to faster 4G (and possibly 5G in some countries) unlimited international data. Current roaming agreements with international carriers have allowed T-Mobile to allow all of its Simple Choice Plan users to avail internet practically anywhere in the world, albeit EDGE or WiFi Calling, which I expect T-Mobile to also expand to all business users too. Whatever T-Mobile's move will be, I can assure you it will be UNmatched by the competition.
To (even) better position itself in the wireless market, T-Mobile must make even more robust its wireless network and feverishly working to expand its network footprint and increase the quality, likely through the procurement of more low-band or wide-band spectrum.
Either way, thanks to T-Mobile, again, all other carriers' customers will likely feel the impact of the forward-thinking, savvy CEO, John Legere as #theothers, as John calls them, follow (or try to, anyways).