How do I Change my email
How can I change my Apple ID? (Email)
iPhone 6s, iOS 14
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How can I change my Apple ID? (Email)
iPhone 6s, iOS 14
See this article: https://support.apple.com/en-us/HT202667
See this article: https://support.apple.com/en-us/HT202667
Also see
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.
How do I Change my email