How to change the notification sound on Apple's mobile phone?

Take the iPhone 7 mobile phone as an example. The replacement method is as follows:

First, click "Settings" on the desktop of iPhone 7.

Second, after entering the settings, select the "notification" option to enter.

Third, then find the application that changes the notification sound. Take "information" as an example, and click enter.

Fourth, after entering the application, select the "sound" option.

5. After entering, you can modify the sound of the notice.