I've just started customizing my Infuse. I downloaded a song using the "Music Download" app. Then I used the "MP3 Ringtone" app to make a ringtone out of it, just like I had done on 2 previous songs. I assigned those 2 previous songs to specific contacts and they work just fine. The new one I did, I tried to make my "Default Incoming Call Ringtone" and it doesn't work. I checked, and the edited 15 second version is stored in my phone, just like the other 2 are. I don't know what else to do, it's driving me crazy!