What is the longest ringing time of Apple's mobile phone?

The longest time for iphone custom ringtones is 40 seconds. How to set:

1. Start itunes, enter the home page, and click File in the menu bar to add the file to the database, as shown in the following figure.

2. Enter the music folder of the computer and select the music to be set as ringtone to open, as shown in the figure below.

3. Click on the song in the database, and you can see that a worm has been added, as shown in the figure below.

4. Move the mouse to the file of Worm Fly, click the three points behind Worm Fly, and select the display outline, as shown in the figure below.

5. After entering the introduction, click Options, as shown in the figure below.

6. Set the start and end time in the options, with a maximum interval of 40 seconds. This must be met, and then click OK, as shown in the figure below.

7. Left-click on the song and click File-Convert in the menu to create the ACC version, as shown in the figure below.

8. The file was created successfully. Right-click the new file for 40 seconds to display it in the Explorer, as shown in the following figure.

9. Enter the resource manager, change the extension of Bugerfei from "m4a" format to "m4r", and click Yes in the prompt window, as shown in the following figure.

10. Click Label Music and select Edit menu, as shown in the figure below.

1 1. Check the bell in the menu, and then click Finish. Bring the ringtone closer to the music and synchronize it.