Sign in to your Apple Account
You use your Apple Account to access Apple services such as the App Store, the iTunes Store, Apple Books, Apple Music, FaceTime, iCloud, iMessage, and more.
To sign in to your Apple Account, go to Settings  > Apple Account. If you have an iPad (with iPadOS 17 or later) or another iPhone (with iOS 17 or later), you can simply bring your iPhone near your other device. Otherwise, you can manually sign in. To verify that you’re signed in, go to Settings  > [your name]; your Apple Account appears below your name.