Answer:

ringtone

AnswerCrossword Clue
RINGTONECellphone's sound (and a 2006 dictionary addition)
RINGTONEDownloadable alert
RINGTONEModern caller ID, perhaps
RINGTONECellphone customer's creation, perhaps
RINGTONECaller ID, perhaps
RINGTONEYou might get a special one for Dad
RINGTONECell phone selection
RINGTONEBars for a cell?
RINGTONENotes to pick up on?
RINGTONEDownloadable cell phone alert
RINGTONEDownloaded ditty
RINGTONEAnnoying thing to hear in a movie theater
RINGTONEA few notes that require answering?