I have been meaning to do the research into the different 4G spectrum holdings of carriers in the US when AT&T clamored that they needed more spectrum in their bid for T-Mobile. When that deal fell through I shelved the story but I am glad to see that Brad Reed from Network World did the full research. He dug into the top US carriers and charted out their spectrum holdings and constraints. He explains why Verizon is best set for a faster LTE rollout and what AT&T and Sprint are waiting on for theirs.
If you are interested in the future of LTE in the US I highly recommend reading all of Reed’s analysis here