How to import m4r ringtones into iPhone

connect your phone to your computer and open iTunes.

2. ? Open the folder where your ringtone is located and select the file.

3. ? Click the "ringtone" on the right and drag the file. Extension

m4r is an audio format of iPhone ringtone. At present, there are 25 ringtones in the iphone system, including marimba, ringing (spring sound), vibrato, pinball sound, piano repetition, barking, guitar strumming, etc. The format is m4r, allowing users to add custom ringtones.

In p>25, SmashTheTones (now "Mobile17") became the first third-party tool to allow users to make ringtones online without downloading software or digital encoders.

Subsequently, Apple's iPhone allowed users to make ringtones from songs purchased through iTunes, but there were some difficulties, including the limitation of ringtone length of 4s, and the need to create an AAC version, and then change its suffix name to m4r. Resources

Apple support-ringtone settings