I switched from my iPhone and turned off iMessage and also de-registered it but I can receive individual text but not group text. Anyone else have that problem?
Yes, the only solution is group messages from all your friends phones and yours must be deleted. I had this issue and it took a long time before I started getting group messages again.
What I did that worked, have all of your friends in the group delete any threads that have you in it. You delete all of your messages too. I then sent everyone an individual message. Then group message started working fine.