Not true. Even with the latest iOS 11, iCloud is opt-in, and not required. https://www.macworld.com/article/3252170/data-center-cloud/do-you-have-to-use-icloud-

Not true. Even with the latest iOS 11, iCloud is opt-in, and not required. https://www.macworld.com/article/3252170/data-center-cloud/do-you-have-to-use-icloud-services-when-you-upgrade-to-ios-11.html https://www.macworld.com/article/3252170/data-center-cloud/d... Clearly, there are some features that rely on iCloud, but you can choose not to use those features and still have a functioning device.