Use the list below to make sure that each store or service is using your updated sign-in information. You can use these steps to sign in on your iPhone, iPad, iPod touch, Mac, PC, and Apple TV.
In some cases, you don't need to update your Apple ID or password on your device until the next time you're asked to sign in to the store or service. But if you're using services to share information or communicate with others, you should update your Apple ID or password immediately.