Jun 24, 2014
If you receive a spam text message, use the following method to report it.
Forward the spam text message to spam (7726)
You will then receive a text asking for the phone number that the text message was sent from; text that number back
You will then receive a "thank you" text. No additional action is necessary.
http://www.fcc.gov/guides/spam-unwanted-text-messages-and-email