I can't use the picture button on my iPhone?

Okay so I've looked up a lot of questions but none are really the same as mine. On my iPhone 4 I just got like two days ago (tmobile) i can't send pictures like at all the camera icon is there when i text but its faded and i can't click it and I think it has to do with the SMS I guess but I don't know how to change that even if that is it and I get I should go to the store if I can't get it so don't tell me that just try to help me out if you can thank you

I had this problem too, this is how I fixed it.
1. Connect to itunes.
2. Make backup.
3. Put in recovery mode.
4. Restore Iphone.

Hope this helps

Take backup and restore it or restart it… May be it works