I still have a long pause before the MMS actually sends. Is this something that will be fixed? Or something that will always happen? I remember some of my old phones (non-iPhones) doing the same thing.
Nothing here... same red "!" and messages sent from others never get to me. Called AT&T, they starting IMing with tech support who looked at my account. Then the rep removed something then reapplied, rebooted my phone and still nothing. The tech got back to the rep and said I would have to wait 24 hours. I still feel something is wrong with my account.... oh well.
I was having this same issue... you have to call. The computer program that took the Opt-Out code off all the iPhone accounts for some reason skipped yours. I signed on to live chat and had it fixed in a couple of minutes