This is killing me. It has been 24hrs of red exclamation marks every time I send picture messages. Yet, other people in my area with the iPhone are not having issues. I've done the carrier update, soft reset, hard reset, full restore, sim card in/out, called AT&T yesterday to add/remove my messaging package. I called today and they tell me I need to wait 24hrs. Oh great. Is there anything else I can try?