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iMore Question
I can't use the ap store they don't reconize my e`mail on file its an old one. My phone is the i 4 can you help
Welcome to iMore.
Here is a guide by Christine Lachance of iMore on how to manage your email accounts with the Mail app.
You can reset your email for your Apple ID or iTunes.
Manage ID
https://appleid.apple.com/
Forgot ID
https://support.apple.com/en-us/HT201487