How long can the ringtone of iphone7 be set?

1. Open itunes and select File-Add File to Library in the menu bar. Click to download the iTunes software

2. Select the song to ring, and click

3. The song will appear in the "Music" in the "Library". Right-click the song, select "Show Introduction"

4. Select "Options" and fill in the "Start Time" and "Stop Time" (within 4 seconds) PS: Select "Create ACC Version"

6. Files with the same file name but less than 4 seconds.

7. Right-click the newly created song, select "Show in windows explorer", change the format of "m4a" to "m4r"

8, and add the M4R file again according to step 1. Find the ringtone in itunes and sync it to your phone. Hope to adopt