If you own any Apple devices, you should create an iCloud account right once because it is the company's official cloud service that allows users to save their files and data safely and automatically. To set up the service on your new iPhone 7, follow these steps:

1. From the Home screen, choose Settings.
2. From the Settings menu, scroll to and hit iCloud.
3. Enter your Apple ID as well as your password.
4. To continue, tap Sign In. Tap Establish a new Apple ID if necessary, and then follow the onscreen instructions to create a new Apple ID account.
5. When prompted, hit Integrate to let iCloud merge your iPhone's contacts, calendars, and Safari data. You can skip to the next step if your iPhone is already logged into an Apple ID account, but if the Wi-Fi Calling for Other Devices notification appears, tap OK.
6. Scroll to Backup on the iCloud screen and touch it. When your iPhone is connected to Wi-Fi, iCloud Backup is activated by default to help back up your personal information.
7. Tap the choice to Back Up Now to make a new backup of your iPhone.
8. Wait for the iCloud setup to finish so that your iPhone may be backed up.