You can change your iCloud account on an iPhone with a few taps, and you can also use a separate account for your iTunes & ...

An Apple account serves as the cornerstone of your experience within Apple’s ecosystem, granting access to services like iCloud, the App Store, Apple Music, and Apple Vision Pro. Whether you’re ...

To sign out of iCloud on all of your devices at once, you can head to iCloud's website and change your password.

Messages is designed to sync across all your devices logged into to the same iCloud account. iMessages sync by default; SMS/MMS and RCS messages sync if you’ve enabled access to them from your iPhone.