How can I solve group chat messages not showing up?

[AC Question]

I just got the galaxy s6 and my friends are adding back to all the different group chats we had. In one of the group chats all my friends have iPhone's and I can't see all the text that are coming through the chat. How can this be fixed?

 

[Almeuit]

Ensure you have the right APN settings set. After that ensure you always have mobile data on since it needs this for group messages.