I got this message too. I've never gotten junk texts before and I'm very very careful about giving my number out to anyone. The first junk text I got (this was my third before finally googling the number) was RIGHT after visiting family in IL (I live in AZ) and calling the 1-800-free411 there. Here it has always worked fine and never cause trouble. The messages there were a little different and after I hung up I got the first message. I wonder if it could be tied since the free 411 works by advertising to you. Maybe there they consider your call to be an "ok" to put you on a junk text messaging list?
Re 13058770530
In addition to filing a complaint with the FTC I also contacted ATT's wireless customer service. At first the person I spoke to tried to act like I knew the person I got this text msg (above) from. Then when she understood tried to act like she couldn't do anything. So I let her know that I had filed a complaint with the FTC and that if they did not do anything about this I would let the FTC know that I contacted ATT and they did nothing. She then after documenting everything gave me to a supervisor, who stated ATT is aware of the problem - Telemarketers are using text messaging to get around the do not call law.
The supervisor stated - do not reply to message you will end up getting subscribed to a service that will cost you $19.95 a month.
He stated to send a new text msg which I did saying, "Stop all msgs", and I also included, "you have been reported to FTC and ATT." He then credited me the $.15 for the message I received and $.15 for the new message he instructed me to send.
Therefore when you call a rep at ATT and you do not get any results, ask to speak to a supervisor since ATT is aware of this problem.