Recently, it was announced by AT&T that they would introduce data caps for its internet customers. 

The company plans to begin capping users of its slowest at 768 kilobits per second DSL service at 20Gb per month. As the speed of the plan increases up to 150 gigabytes per month at the 10 megabits-per-second level, the limit would increase too. 

In an FCC filing, the company said, "AT&T plans to initiate a broadband Internet access usage trial in Reno, Nevada beginning in November."

It added further, "AT&T will be providing written notice to customers involved in the trial, explaining that their broadband service will be subject to a certain monthly usage tier for the total amount of data they may send and receive, as well as a per gigabyte charge in the event they exceed the usage tier."

It is being estimated by the company that as of now, 5% of users on AT&T's networks were accounting for 50 per cent of the traffic. 

In the beginning, the caps will be used on customers in Reno and AT&T will observe their response before deciding to launch it on national level. 

"Users will be able to track their monthly data usage on AT&T's web site, will be warned when they reach 80 per cent of capacity and then be charged $1 per Gb over the capped limit," said the company.