Cellphone customer's creation, perhaps

• Modern caller ID, perhaps
• One's heard on the phone offering to negotiate, to some extent
• Caller ID, maybe
• You might get a special one for Dad
• Annoying thing to hear in a movie theater
• Downloadable ditty
• Incoming-call sound
• Caller ID, perhaps

Wikipedia Word definitions in Wikipedia
A ringtone or ring tone is the sound made by a telephone to indicate an incoming call or text message. Ringtone may also refer to: Ringtone (film) , a 2010 Malayalam film "Ringtone" (song) , a song from the Internet Leaks EP from "Weird Al" Yankovic " The ...