Change Apple ID
My daughter has an email that is very dated now that she is older. She wants to change her Apple ID to a new email address. Can she create a new ID and start using it with everything she has with Apple?
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If you create/use a new Apple ID, she will lose access to some of her data and the purchases made with her existing Apple ID. I suggest she do a name change on the current ID.
Note the restrictions in the article.
What to do after you change your Apple ID or password - Apple Support I suggest doing this before you change your Apple ID or password.