I just got my 4S today and I'm stunned to find out that the ringtone selection on the phone is horrible. I don't want my phone to sound like a duck or a train, or my grandmothers old phone. I have a ringtone(mp3) stored on my pc and can't figure out for the life of me how to get it on the phone. I tried Dropbox, tried putting it into the itunes library, and nothing. Any suggestions?