Composer Him Sophy, who studied in Russia for 13 years after surviving the Khmer Rouge labor camps, has blended rap, religious chanting, rock, his country's ancient music, operatic styles, pop and even added a Khmer Rouge propaganda song as a cell phone ringtone in the production.

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People do not care what kind of technology they are using when they are making a phone call or downloading a ringtone, says Julian Horn-Smith, Vodafone's chief operating officer.

ECONOMIST: Mobile telecoms

Instead, you make a similar statement by displaying your mobile phone, with its carefully chosen ringtone, screen logo and slip cover.

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When my cell phone rang, he started dancing to the ringtone.

NEWYORKER: The Kingpins

When you save the file on your phone, you can use the mp3 as a ringtone too.

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The top clip was President Obama being interrupted in the middle of a speech by a quacking duck ringtone on a reporter's cell phone.

FORBES: Journalism

Many mobile phone users like to be creative and have fun with their ringtones, and their ringtone choice can reveal much about their personalities.

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The fear of losing her ringtone collection all over again is holding her back from buying her new dream phone (LG Chocolate).

FORBES: The Mobile Locker