Why cant I get images through MMS on straighttalk ATT SIM?

[dustspot]

I have done everything I can to the APN settings. I finally have the 4g working, I can access the internet and stream video without wifi. The one thing I can't do is text pictures??? Or receive them? Can anyone help? I can text messages fine.

 

[B. Diddy]

Just to be sure, are these the settings you're using? StraightTalkSIM DATA APN Settings ATT