What's wrong with iCloud being unable to synchronize?

Apple's mobile phone iCloud can't be synchronized, which means it can't be synchronized because some items are not turned on.

ICloud[ai][kla_d] is a cloud service provided by Apple, which allows users to store 5GB of data for free. ICloud is a private cloud service provided by Apple, which allows users to store 5GB of data for free, making it convenient for Apple users to enjoy personal data between different devices. ICloud supports user devices to push data wirelessly, which is simpler than Apple's traditional iTunes solution (which requires a data cable connection) and has a better user experience.

ICloud organically combines Apple's music service, system backup, file transfer, notebook and tablet product lines, and they are closely related. In Jobs' view, iCloud is a service platform different from previous cloud computing. The server provided by Apple should not only be a simple storage medium, but also bring more to users. Let's take a look at what new experiences iCloud will bring us.