T-Mobile is passing down some of its “Uncarrier” perks to MetroPCS. The first is Music Unlimited, which is really just a rebranded version of T-Mobile’s Music Freedom. Starting November 19th, MetroPCS customers who choose one of the company’s new $40, $50, and $60 plans will be able to stream popular music services without it counting against their data usage.
Source: MetroPCS customers are getting unlimited music streaming | The Verge