For the best iCloud experience, make sure your device meets the minimum system requirements.
Use the latest version of iOS and iPadOS
Make sure that your device is running the latest version of iOS or iPadOS. Go to Settings > General > Software Update. See if there’s an update available.
Sign in to iCloud
Go to Settings and sign in to your device with your Apple ID. When you sign in, iCloud is turned on automatically.
Customize your iCloud settings
Go to Settings, tap [your name], then select iCloud. Choose the apps—like Photos, Contacts, Calendars, and third-party apps—that you want to use with iCloud.
Set up iCloud on your other devices to keep your content up to date everywhere.