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Daniel Ek 'not worried' about Spotify's competition

11 December 2013 Last updated at 21:56 GMT

Spotify has announced details of its plans to allow mobile and tablet users to listen to music for free.

But the co-founder and chief executive of the music streaming service, Daniel Ek, says he's not worried about the competition.

The changes will be funded by advertising and put Spotify in direct competition with iTunes radio.

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