When selecting ringtones, does it sound out? can you hear the phone sing?

When you look at the profile editor (where you select ringtones) are all the bars to full volume? Scroll up and down and make sure they are all full. Is your profile selected? Select silent and then go back to general, then try again.

Also, get a second phone and call yourself, let us know. Finding missed calls is easy to do, phone takes a full second or two to actually start ringing, so short-ringing "beeping" friends can easily leave missed calls with no audio. Make sure the song doesn't take forever to start.