International Telecommunication Union: worldwide mobile subscriptions hit six billion in 2011By J. Rigg, 10.12.2012
Pew survey finds that 17 percent of US cellphone users go online mostly on their phonesBy D. Melanson, 06.27.2012
UN: worldwide internet users hit two billion, cellphone subscriptions top five billionBy D. Melanson, 01.28.2011