In this video tutorial, viewers learn how to create free custom ringtones for an iPhone 3G. Begin by opening iTunes and select the song that you want as a ringtone. Right-click on the song and select Get Info. Go to the Options tab and make the song last only 40 seconds. Then right-click on the song again and select Convert AAC Version. Now open the file in the iTunes folder and rename the m4a to m4r. Click on Use m4r to confirm and open the file in iTunes. This video will benefit those viewers who have an iPhone 3G and would like to learn how to create a free ringtone for the phone.