It was 5 billion in 2010: http://reviews.cnet.com/8301-13970_7-10454065-78.html http://reviews.cnet.com/8301-13970_7-10454065-78.html Life for the average pers

It was 5 billion in 2010: http://reviews.cnet.com/8301-13970_7-10454065-78.html http://reviews.cnet.com/8301-13970_7-10454065-78.html Life for the average person in the bottom billion isn't great, but it's getting better. edit: http://en.wikipedia.org/wiki/List_of_countries_by_number_of_mobile_phones_in_use http://en.wikipedia.org/wiki/List_of_countries_by_number_of_...