Can iphone customize SMS ringtones?

Yes, the steps of customizing ringtones are as follows;

1. Install the latest itunes software on your computer.

2. Import songs into itunes. Path: Music-File-Add File to Library-Select Song-Open.

Make ringtones. Path: Select a song-right click-select Show Introduction-Options-Adjust the volume 100%- Set the start time and stop time (Apple's ringtone can only be set for 40 seconds)-OK.

Click on the song-create ACC version-click on ACC version-right click-display in windows Explorer to change the song format from "m4a" to "m4r".

Step 2: Import ringtones into itunes.

1. path: ringtone-file-add file to library-select song-open.

2. Plug in the phone and select ringtone synchronization.

Step 3: Mobile phone settings.

Settings-Sound-Ringtone-Customize-Select Ringtone.