My experience with iMessage has been that the group text continues to function as an MMS group if a member switches OS, even if it was an iMessage group beforeh

My experience with iMessage has been that the group text continues to function as an MMS group if a member switches OS, even if it was an iMessage group beforehand. Or sometimes someone even sends a one-off MMS at a time that they have cellular reception but no data, and the messaging app still seems to know which group text to put it into. So I guess my experience is that you don't get kicked out of the group.