How to receive multimedia messages through iMessage on the iphone?

I was recently on a trip with my school and we made a few group messages on iMessage so we could text everyone together instead of individually. While at the airport, everyone decided to send their pictures to the group. My phone was on the airport Wi-Fi and I did not receive any of the pictures however I know I was included in the group. I tried switching the Wi-Fi off and turning the cellular data on to see if I would get them but I still have not gotten any of the pics. I was wondering if there's a way to try to get them on my phone now?

My guess is because you had celluar off that the message never went through. Its not email, so it won't queue up and wait.