How to set SMS ringtone on Apple mobile phone?

1. Open the phone and click the "Settings" option in the figure.

2. Close the interface after entering the "Settings" option.

3. Next, find the "Sound and Touch" option and click it.

4. Then click "SMS ringtone" in the "Sound and Touch" option.

5. Choose your favorite ringtone according to your preferences, and put a tick in front. So you can see that the SMS alert tone has been set successfully.