Vodafone has 315m mobile customers, more than the size of the US population

"Proportionate mobile customer base of 315.3 million; 8.0 million net additions during the quarter"
Source: Vodafone Interim Management Statement for the Quarter Ended 30 June 2009, 24th July 2009
Vs.
US population of 307,014,052
Source: US Census Bureau Population Clock, retrieved 27th July 2009