FCC Proposes to Open 3.5GHz Spectrum to Small Cells
2300 (if at&t actually rolls it out)
and those are just bands we use here in the US... add in several more if you want a global phone which will work anywhere. How about we start making more effective use of the spectrum that we have before we start issuing even more of it? If nothing else, this will keep some RF engineers well-employed.