MMS won't work on StraightTalk
I have an iphone 4 that was previously on AT&T now on StraightTalk. Everything works great but MMS. I can't send or receive picture or group messages. I have tried sim swap, resetting to factory default settings, StraightTalk and Apple support. I have a case number with Apple,but so far nothing has worked, and I kept getting a new person and had to explain everything several different times. It seems that I can't access the menu needed to enter the correct settings. I don't know what else to try. Is there any hope of getting this feature to work for me?
iPhone 4, iOS 6.1.3, Straight Talk service