Hello, how to retrieve the self-contained programs (such as information, phone calls, e-books, etc.) if they are missing:

If the system programs cannot be directly deleted (except ROOT), you can move them to other pages or other folders on the desktop, and you can look for them in other pages or other folders on the desktop. For example, the "Hui" on the desktop or other ordinary folders created by yourself can be moved out of the desktop by long pressing the icon after being found in the folder.