Help MMS not working on LG G4

[Vestitor]

I just got a LG G4. I have been able to get every other phone I have tried to work on Straight Talk, but I cannot get mms to work on the G4. I have mobile data working but the mms just sits and spins. I have searched for apn settings but they all seem about the same. The phone is a AT&T branded phone. The phone currently shows 4G LTE coverage. Anybody have any suggestions for me to try?