How to reset the ip address of Apple mobile phone?

Take the iPhone 7 mobile phone as an example, the setting method is as follows:

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

Second, after entering the settings, select the currently connected network to enter.

Third, click on the symbol indicated by the red arrow below to enter.

4. Select the "Configure DNS" option after entering.

5. Then click "Mobile Phone" to enter.

6. Select "Add Server" after entering.

7. Then set the IP address and click Save.