AT&T (NYSE:T) CEO Randall Stephenson said that if the company's proposed $39 billion purchase of T-Mobile USA is approved by regulators, AT&T will spend $8 billion over three years to expand LTE coverage to 97 percent of Americans. Speaking at a conference, Stephenson said AT&T thinks it will be at least six years before the FCC can get a significant amount of spectrum into the market, which is why AT&T felt compelled to make the T-Mobile deal. He said AT&T's move to LTE is more about spectral efficiency and lower latency than simply boosting transmission speeds. Article