This list ranks the countries of the world by the number of mobile phones in users. The world now has 5.6 billion mobile phone users.
The United States is the use of mobile phones in the world 3 is in order. According to data from june 2011 has 327,577,529 mobile phone users in USA. China cell phone users in most countries around the world. India is in second place.
How Many Mobile Phone Users in the World? See here this link.