Guys, I think the problem comes from the ATT network. Hear me out. Yesterday I got the message for the first time ever, and I had to power off the phone to get rid of it. But yesterday, I sent a text to my wife and my daughter, and I tired to get my data usage through the automatic system that uses texting and an auto response message from ATT. I never received the auto response, and then when my wife came home she asked if I got her text in response to my earlier one. I had not. So we sent a text from her iPhone to my Captivate at the kitchen table, and it never got to my phone. Obviously my ability to receive texts was messed up. I went to the ATT store today, and after an hour of the salesperson trying several different things, she had to call into Tech support. They had to reset my account in their system from their end (the store person had also reset it in the only way she could, but it didn't work), so something got scrambled in their system. I think it was not a coincidence that on the day that my texting goes haywire in their system, I get that pesky message displayed on my phone!