Mobile phones are more popular than CD players when it comes to listening to music, says the Entertainment Retailers Association (ERA).

According to the ERA in the past two years, 44 million mobile phones that feature MP3 capability have been sold, compared to just 8 million CD players in the same period. The ERA also highlighted that between September 2007 and September 2008, 32.1 million MP3 devices were sold in the UK, 75 percent of which were mobile phones.

"Never in the history of the music business have we seen a format take off like this before. There is now no doubt that MP3 is the fastest-growing music format of all time, faster than vinyl, cassette or CD," said Russel Coultart, chairman of ERA Digital.

See also: New MP3 logo raises awareness of audio format

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