An agreement between Sprint and a group of leading radio broadcasters has taken radio mobile (again). This time, its on/through your smartphone. Sprint will offer the NextRadio app on those devices that are FM-enabled (includes an FM receiver on a chip integrated into device hardware).
The advantage that NextRadio will have over traditional streaming radio (though iHeart, Pandora, and others) is that the radio signal will not count against your service plan, as it uses regular radio broadcast signals rather than data streams. That is, if your smartphone is FM-enabled. So far, only two recently-released smartphones from HTC include the FM chip and NextRadio app.
Source - Radio Industry Delivers FM-enabled Smartphone App to Consumers, Broadcast Newsroom