A lot of the growth is coming from emerging markets. Sales of smartphones and tablets to those regions will make up 53% of the total this year, according to CCS Insight. The research firm sees this number rising to 65% by 2017. Another driving force behind the explosion in smartphone sales is the more widespread availability of 4G service. 64 million 4G enabled phones were sold last year, a figure dwarfed by the expected sale of 227 million 4G enabled handsets in 2013.
source: CCSInsight via IntoMobile