So I have never had spam before on my phone, but today I got two. I haven’t signed up for anything and I don’t have text messaging as a part of my general plan, so I get charged $0.20 per message (either incomming or outgoing). I don’t text anyway, I use email for any kind of messaging. All the people who have my contact info know that anyway. So I searched some forumns and here is what I found.
Go to this site and read what I read and how to:
http://www.wireless.att.com/answer-center/main.jsp?solutionId=KB92121&t=solutionTab
So if you register at: mymessages.wireless.att.com , then you can customize how your phone text are received from any kind of email and such. I just blocked everything. Once again, I use my email.
This pdf link was also helpful: http://www.wireless.att.com/support_static_files/KB/svc/documents/1220912515172.Anti-spam%20FAQ%20080707%20Consumer.pdf