How to send pictures on my iPhone 4?

Okay well I had a Data block on it for a while but when my stepdad took it off I did some googling and realized I could send pictures now. But I send it and it doesn't go through! Do I need to have Cellular Data turned on? I have MMS on, but not sure about the cellular data. And do I have the unlimited messaging? We have the family plan that let's you have unlimited text for $30, with AT&T.

You have to have a data plan with your carrier. You either need to have Wi-Fi or 3G/4G turned on to send anything. Turning on cellular data might work. Otherwise use Wi-Fi when you can, if you have any problems goto the AT&T store and they will fix it.

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