In 2011 AT&T warned its heavy data using mobile customers that it would reduce their connection speed if said usage inched in to the "top five percent." AT&T is defining that metric as anyone who uses more that 2.1 GB of data a month. As chronicled in this NYT blog post, one of AT&T's customers hit the 2.1 GB mark and had his connection throttled. The problem, that customer says, is that he has a data limit of 3GB a month because a legacy unlimited plan.































