How does iPhone set up automatic reply SMS for incoming calls?

Here, taking the iPhone 6 mobile phone as an example, the setting method is as follows:

First click the "Settings" icon on the mobile phone desktop, as shown in the figure.

2. Then select the "Phone" option in the setting interface of the mobile phone, as shown in the figure.

Third, then open "Reply with information" on the telephone interface, as shown in the figure below.

Fourth, finally set the content of the automatic reply message, as shown in the figure below.