How to set the ringtone of iphone SMS?

(1) Open itunes 1 1 and select File-Add File to Library in the menu bar.

(2) Select the song to ring and click "Open".

(3) Songs will appear in the "library" of "music". Right-click the song, select "Show Introduction", select "Options", and fill in "Start Time" and "Stop Time" (within 40 seconds). -"Okay"

(4) Right-click the song again and select "Create ACC Version"

(5) files with the same file name, but the duration is less than 40 seconds.

(6) Right-click the newly created song, select "Display in windows Explorer", change the format of "m4a" to "m4r", and select "Yes" in the pop-up window.

(7) Check: Find Preferences in Edit of itunes menu bar, open the box in front of Ringtone in Common-Source, and then click OK.

(8) You can see the "ringtone" in the "database". Turn on the "ringtone" and you can see whether your file has been turned into a ringtone.

(9) Then turn on the iphone in the device, select the ringtone, check the item "Synchronize ringtones", select "All ringtones" or "Selected ringtones", and then select "Synchronize".

(10) After the ringtone is successfully synchronized, the ringtone will appear in Settings-Sound-Ringtone-Custom. To use this ringtone, just select it.