Convert your MP3 into an iPhone ring tone
Most of my iTunes music is in mp3 format. Mostly because I dumped my CDs far before using iTunes. Far before using Mac OS X in fact… Anyway… I remember I used to use my mp3 files as ring tone when I used a Nokia 5310 XpressMusic. And that was quite easy to do. Something like, going to ring preferences and selecting the mp3 files. But with the iPhone, it is just not possible. Or at least, it is not possible straight away. This is how I did it.