I am having trouble receiving group messages on my Samsung Galaxy S8. I recently switched from Iphone 6. I already checked to see if i was still registered for imessage and I am not. I am able to send the messages to a group, but I am not receiving the replies. This seems to occur when texting to iPhone users. I am also not receiving messages when iPhone users are including me in group text. Not sure what to do. I am using Samsung Messages.