How does itools set the ringtone of Apple mobile phone?

Open itunes

",select File in the menu bar-add file to the repository.

2. Select the song to ring and click Open.

This song will appear in "Music" in "Music Library". Right-click the song and choose Show Info.

4. Select "Options" and fill in "Start Time" and "Stop Time" (within 40 seconds). -"Okay"

5. Right-click the song again and select "Create acc Version"

6. A file with the same file name but less than 40 seconds will appear.

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

8. Check: Find Preferences in the Edit menu bar in itunes, open the box in front of Ringtone in Favorites-Sources, and then click OK.

9. You can see the "ringtone" in the "database". Turn on the "ringtone" and you can see if your file has been turned into a ringtone.

10. Then open "iphone" in Devices and select Ringtones, check the item "Synchronize Ringtones", select "All Ringtones" or "Selected Ringtones", and then select "Synchronize".

1 1. After successfully synchronizing the ringtone,

Ringtone will appear in Settings-Sound-Ringtone-Customize. To use this ringtone, just select it.