9 Sync Messages to iCloud
Apple will soon add a feature to iOS 11 that will allow users to sync their messages with iCloud. All the Apple devices that you’ve signed in will automatically sync their messages with iCloud. So if you delete a message from one device, it will be removed automatically from all the other devices where you’ve signed in. This feature also saves a lot of local storage space because all your messages will be stored in the cloud and only the recent messages will be stored locally on your device.
While this feature was removed from the early betas of iOS 11, Apple will soon bring it back in future updates.