I'm having the same problem and when I contacted Sprint, his answer was that I was trying to send too LARGE of a file. I said, "there's no way to take a smaller picture, I just point and click". And I said, "if I need to take a smaller picture, please tell me how to take a smaller picture." His genius response: "I'm sorry for the inconvenience. You'll need to add the data pack to send pictures." Funny, my messaging add on pack says it includes sending and receiving pictures, so I should be able to SEND AND RECEIVE PICTURES.
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