Android Questions? Ask Android Device Experts for Answers ASAP
Are you trying to send a group text out?
What do you mean retrieve? Do you see the group message within your messages?
Have you asked them to re-send it? Sometimes an attachment does not go through properly and the other people never see it.
If you're using the stock messaging app, you'll find in Settings a check box item under "MMS setting" called, "Group conversations," with the sub-heading, "send messages as group conversations"