If you are confused about all the hype and conflicting information about “4G” wireless, you are far from alone.

Wall Street Journal’s Walter Mossberg, the dean of tech reporters, walks readers through the “4G’ wireless maze.

“It’s a headache for consumers to grasp,” he wrote in Wednesday’s Wall Street Journal.

“So here’s a simplified explainer to some of the most common questions, based on interviews with top technical officials at all four major U.S. wireless carriers.”

By the way, you just might want to make a printout of the story.

It’s good for homework.