I discovered this in the morning. Download the att mywireless app from the app store. Go into you features and switch to a different texting plan. Let that process and then go back and reselect your original plan. Next download the 5.1 carrier update and Observe the glory. I noticed my MMS working directly after all this! Minutes before, it wasn't working at all. Good luck and let me know if this works for the mass population.