People who text message, e-mail, and download files on mobile phones spend $14 a month more than people who don’t, says J.D. Power and Associates.

(PopWireless: This is where cellular companies are making their money now. New activations are way down compared to a few years ago. Everyone that needs a cellular telephone has one. Companies are focusing on encouraging consumers to move to their service from another and on selling add-on services like text messaging. )

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