Not sure where you are getting your information. There was a recent cross the country test comparing the big four's data networks in various states across the Country. Each company had areas in the Country where they excelled. On average, however, AT&T came in first, with T-Mobile a very close second. Verizon was a close third place. Sprint was a distant fourth place.
And that plan is unlimited data, it is just after the 10GBs is used, it drops to 3G. TMobile also does not have a hard throttle policy other than in peak times it might drop the speeds of heavy data users.
For about sixty dollars a month you can get unlimited everything on T-Mobile for two lines - that includes regional and most international roaming and the ability to use your phone as a hotspot. T-Mobile also has cheaper in advertised plans for as low as $35 a month. The disruption is doing away with contracts, including international roaming and 200MB of tablet data for free, and paying generous money to cover expenses to leave your current carrier.
By that logic, Apple should fire its own legal counsel. Perhaps Apple should keep Beat's legal counsel instead as it is getting sued far less. Further, last I checked Beats has not been found guilt of patent infringement.