An Apple ID makes it possible for you to download content from iTunes and the App Store. It also allows you to sync reminders, calendars, and contacts through iCloud, and activates FaceTime and iMessage across multiple devices. Its not mandatory to sign up for an Apple ID if you want to use an Apple device, but it is essential to getting the most out of your iPhone and iPad.
Want to create, reset, change, remove or permanently delete an Apple ID? We show you how. Plus: What to do if you forget your ID or need to reset the password in this Ultimate Guide.