4Videosoft iPhone 4 Ringtone MakerBy 4Videosoft Studio : IPhone 4 Ringtone Maker
4Videosoft iPhone 4 Ringtone Maker is available for iPhone 4 users to Convert MP3 to iPhone 4, iPhone OS 3.0/3.1 Ringtone, even convert any video/audio to iPhone 4 M4R Ringtone, including 3GP, AVI, MKV, RM, ...