[header] How to check data usage on at&t [title] Call * 3282 (* data) to receive a text with your data usage information. [step] It may take a moment or two for the sms message to arrive. Do this from the phone that you want to check the data usage for. 
[substeps] You can also dial * 646 (* min) to check your remaining minutes. [title] Use the myat&t website to check your detailed data usage.