The U.S. airports with the best (and worst) cellular networks

If you're traveling on business or going on vacation with the family, chances are you'll use mobile devices at the airport. You're out of luck, however, if you have a long layover in Los Angeles, Miami or Austin. The super-busy airports in these three cities have terrible cellular connectivity, across all wireless carriers, according to a new report.Oakland, Calif., however — a city that's often overshadowed by its more glamorous cousin across San Francisco Bay — has by far the