Federal Communications Commission Chairman Ajit Pai announced that as a way to help alleviate network congestion, his organization has approved devices that tap into the LTE-U spectrum. Specifically, allowing devices to access the less-trafficked, unlicensed parts of the 5GHz frequency band. In layman's terms this means that as demand for Wi-Fi networks increases, LTE-U backs off a bit. And when the reverse happens, customers can take advantage of some of the unused network capacity for their LTE gizmos. T-Mobile will be among the first carriers to do so, and allow its customers to co-opt the first 20MHz of "underutilized unlicensed spectrum" in the 5GHz band.