Putting heat on the big players is simply the name of the regulatory game -- at least if you're the Department of Justice's Antitrust Division. In a filing with the Federal Communications Commission last week, the DOJ makes it clear that it would like to put additional heat on dominant wireless carriers AT&T and Verizon Wireless. The FCC has a spectrum auction coming up for low-frequency bands. Frequencies under 1 GHz have greater propagation characteristics that allow signals to provide better coverage in rural areas and penetrate buildings more effectively. Because of this, low-frequency bands are an important part of...