You might find it hard to believe but it is true that the fastest growing market for smart phones is Africa. Many will argue that most smart phone buyers in the continent are buying low end smart phones which are cheaper in price and poorer in quality but nobody can deny the fact that Africa is an important market for the phone industry.

http://www.gsmgist.com/2015/08/china-gaint-xiaomi-launches-in-africa.html?m=1