"What's the frequency, Kenneth?" Sprint and AT&T tango to trade PCS frequencies. in The Wall A group blog by The Wall Editors Posted February 19, 2016 Nice. Hopefully this is just the start and we'll see inter-market PCS exchanges between the two companies. There are additional markets where a similar swap could occur, but ultimately a limit on what you can do at some point. There are only so many markets where a C block holder has extra spectrum adjacent to Sprint's non-g block PCS. It'd be nice if Sprint trades for more PCS frequencies in markets that could use it (such as Houston) by giving up excess capacity else where. Where do they have excess capacity?