Nielsen RingScan, a service of The Nielsen Company, has increased its mobile market ringtone data tracking and coverage with the addition of AT&T Mobility's weekly ringtone sales data. Through the expansion, Nielsen RingScan data will now represent ringtone sales of every major US mobile carrier. AT&T, in addition to providing sales data, will also provide weekly ringback sales results for inclusion in Nielsen RingScan's newest report, ringback tracking, scheduled to debut later this year. - who's the hippest of them all? or rather has fans that like paying full price for only part of a song.

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