IPhone 4 Picture Delivery Failed?

I have a white iPhone 4.
Since i upgraded to iOS 6 my picture delivery fails unless it's so other iPhones.
I tried to reset it and it doesn't work. What can I do?

I too have an iPhone 4, and I've been experiencing the same problem with sending pictures. Unfortunately, there doesn't seem to be a fix for this. As it was explained to me, iPhones send pictures as attachments, not messages. You usually have to send the picture twice back-to-back. Annoying, but it seems to work for me…