Revenue of telephone companies

Telephone companies are getting less revenue from voice service, and are relying more on data services for their revenue and profit.

http://tech.fortune.cnn.com/2011/11/04/telecoms-big-hang-up/?section=money_topstories&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2Fmoney_topstories+%28Top+Stories%29