Issue with iPhone 5 MMS

Any iPhone geniuses out there have any ideas on how to fix this? Whenever someone sends me a picture or a video in a text I can see the small view of it, but when I try to open it up it just says "loading". Never stops. I went and turned my MMS setting off, then restarted my phone and that fixes it for about 5 minutes, then it starts back again. Any suggestions?

Thanks