Given the quantity of mobile broadband data that loss-less file streaming consumes, I think this is a pretty significant addition from T-Mobile.
For those unfamiliar with T-Mobile's "Music Freedom", everything you stream is kept separate from the monthly data allowance you buy and does not count against your allotment.
Now, my only remaining question is to determine how much SQ difference exists between blue tooth and wired USB to my car's systems!
http://www.tmonews.com/2015/03/three-new-music-streaming-services-added-to-music-freedom/
