Whenever somebody tries to send me a picture I get this error until they try about a third or fourth time and the picture finally comes through. I have no idea why it isn't working properly the first time. Any ideas?
Maybe the message has expired because it's been a too long time since it has been sent? Some MMS messages expire if not delivered. For example, if you go in a trip, and then come back after the expiring date, the message will not be found anymore.