How does Apple 5s restore the iphone's address book from icloud?

How to recover the Address book from ICloud

The first step: we click "Settings" on the Apple 5s phone and we find the "icloud" after we open it to the setup and then we use the Apple ID if we log in, we don't need to log in.

If you see your iCloud below "Address Book" We need to open before Oh, if not open is not able to back up the OH.

Note: When you close the "Address Book" switch, you will see a confirmation that asks "Do you want to keep a contact on the iphone" and select "Remove from my iphone".

Step Two: Open the contacts option switch.

Well, finally, we can sync all the ICloud data into the iphone.