To stream live audio of USC Trojans football games on your iPhone download the
TuneIn radio app. Then in the app do a search for USC Trojans to find local flagship radio station feeds that are broadcasting live gameday audio or even pre and post game shows. The
TuneIn radio app also has access to tons of radio stations all across the country, so you should be able to find just about any live college football game broadcast from a USC Trojans radio network affiliate station.