How to change ringtones and SMS ringtones for iphone4s without jailbreak?

You can intercept songs and make ringtones in iTunes.

The bell can't last more than 40 seconds.

Select the song you want to play in the iTunes music list, and right-click "Show Introduction"; Enter "options", including "start time" and "end time", and randomly intercept a time period less than 40 seconds.

After confirming the settings, right-click the music again and select "Create AAC Version", which means that iTunes will automatically help you make music in ".m4a" format.

Select the converted music in the list, right-click, select "Display in Windows Explorer", open the folder where the music is located, and find the music location.

Change the extension of music from ".m4a" to ".m4r" (this is the ringtone format of iphone), then double-click the music and play it in iTunes, and iTunes will automatically add the music to the ringtone list.

Then you can synchronize.

But be careful.

The name of the ringtone

Don't start with numbers and special characters.

Otherwise, it will not be displayed on the mobile phone.