How to create ringtone for iPhone

1. Start by choosing the .mp3 file that you’d like to have a piece of it as your ringtone in iTunes.
2. Right-click the .mp3 file and choose “Get Info“.
3. Once the Get Info dialog comes-up navigate to the Options tab.
4. if you trying to extract a portion of the .mp3 file then you wanted to key-in values for the “Start Time” and “End Time” items. Keep in mind that the total length of the ringtone can only be less than 30 seconds.
5. Right-click on the same file again and choose the “Create AAC Version” option. If you don’t see the option on your right-click menu then go to iTunes > Preferences > General Tab and click on the “Import Settings…” button. Change the “Import Using” dropdown menu to “AAC Encoder“.
6. Once the file is converted to AAC version it generates a .m4a file. Drag the file to your Desktop (or any other location that you prefer). The file located at your iTunes folder. For example C:Users\login_name\Music\iTunes\iTunes Media\Music\your_m4a_file
7. Rename the .m4a file to .m4r file.
8. Move the .m4r file that’s on the desktop to the Ringtones folder on iTunes. If Ringtones folder does not exist, just drag the file into iTunes, it will create Ringtones folder automatically.
9. Do a Sync to your iPhone. (Devices->your's iPhone->Ringones tab-> click Sync at the bottom)
10. Once successfully synced, tap on your iPhone Settings app.
11. Tap on the “Sounds” option.
12. Then tap on the “Ringtone” option.
13. iPhone will now display the list of available ringtones and you should be able to see the newly added ringtone at the top of the page under the “Custom” section. Tap on the ringtone name to choose the ringtone as your default iPhone ringtone.