Why is the sound quality of SMS ringtone and incoming call super good for iphone?

1. Open itunes and select File-Add File to Library from the menu bar.

2. Select the song you want to ring, and then click Open.

This song will appear in the "Music Library". Right-click the song and select "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 "Display in windows Explorer", change the format of "m4a" to "m4r", and select "Yes" in the pop-up window.

8. Check: Find the preference in the edit menu bar of itunes, open the box in front of the ringtone in Common-Source, and then click OK.

9. 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.

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

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