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The United States has experienced dramatic changes in mobile phone use since nationwide [[cellular]] service became available in the mid-1980s. For example, the number of estimated mobile phone [[subscriber]]s has grown from about 3.5 million in 1989 to approximately 291 million by the end of 2009, according to the most recent data reported by [[FCC]].<ref>[[Federal Communications Commission]], Annual Report and Analysis of Competitive Market Conditions With Respect to Mobile Wireless, Including Commercial Mobile Services, Fifteenth Report (June 27, 2011).</ref> Further, the number of Americans who rely exclusively on mobile phones for voice service has increased in recent years. For example, by the end of 2009 over 50% of young adults aged 25 to 29 relied exclusively on mobile phones, according to the most recent [[FCC]] [[data]].<ref>''Id.''</ref> The way individuals use mobile phones has also changed. For instance, while average minutes of use per mobile phone subscriber per month has declined in recent years, [[mobile]] [[text messaging]] traffic has increased.<ref>''Id.''</ref> About 88% of teenage mobile phone users now send and receive [[text message]]s, which is a rise from the 51% of teenagers who [[text]]ed in 2006.<ref>A. Lenhart, ''et al,'' "Teens and Mobile Phones" (Pew Internet & American Life Project) (Apr. 20, 2010).</ref>
 
The United States has experienced dramatic changes in mobile phone use since nationwide [[cellular]] service became available in the mid-1980s. For example, the number of estimated mobile phone [[subscriber]]s has grown from about 3.5 million in 1989 to approximately 291 million by the end of 2009, according to the most recent data reported by [[FCC]].<ref>[[Federal Communications Commission]], Annual Report and Analysis of Competitive Market Conditions With Respect to Mobile Wireless, Including Commercial Mobile Services, Fifteenth Report (June 27, 2011).</ref> Further, the number of Americans who rely exclusively on mobile phones for voice service has increased in recent years. For example, by the end of 2009 over 50% of young adults aged 25 to 29 relied exclusively on mobile phones, according to the most recent [[FCC]] [[data]].<ref>''Id.''</ref> The way individuals use mobile phones has also changed. For instance, while average minutes of use per mobile phone subscriber per month has declined in recent years, [[mobile]] [[text messaging]] traffic has increased.<ref>''Id.''</ref> About 88% of teenage mobile phone users now send and receive [[text message]]s, which is a rise from the 51% of teenagers who [[text]]ed in 2006.<ref>A. Lenhart, ''et al,'' "Teens and Mobile Phones" (Pew Internet & American Life Project) (Apr. 20, 2010).</ref>
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== References ==
 
<references />
 
   
 
== Source ==
 
== Source ==
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* [[Mobile phones and RF energy exposure]].
 
* [[Mobile phones and RF energy exposure]].
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== References ==
 
<references />
 
[[Category:Definition]]
 
[[Category:Definition]]
 
[[Category:Wireless]]
 
[[Category:Wireless]]
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