iSharesoft iPhone Ringtone Maker helps you make iPhone ringtone by converting multiform video/audio files including AVI, MPEG, WMV, DivX, MP4, H.264/AVC, AVCHD, MKV, MP3, WMA, WAV, RA, M4A, etc. to M4R iPhone ringtone, and transfer the ringtone to iPhone directly after conversion if you want. Moreover, you can also clip any music segment from video/audio file and turn it into iPhone ringtone. iPhone 3GS (iPhone OS 3.0) is available.