Text message
When sending a text message on one of our three Iphones, it copies on the other two. Why? What do I need to do to change it?
iPhone 8 Plus, iOS 14
Question marked as
Immediately stop sharing an Apple ID. Each and every person, regardless of age, needs her/his own Apple ID.
Thoroughly cleanse each person's iPhone receiving a new ID as follows:
What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support