Global market of smartphones: frontrunners and outsiders

As it was informed by "Market Leader (US)"

Global market of smartphones: frontrunners and outsiders

Now we can definitely say that smartphones have revolutionized the global market of mobile devices as well as our lives. They give us an opportunity to lead a mobile live, staying online wherever we are.
Apart from making phone calls and sending SMSs, now people have an opportunity to browse the web, play hi-quality games, enjoy a wide range of various apps for different purposes like business, sports, health etc.
What interest can the global market of smartphones present to investors? What companies are the frontrunners and outsiders of this market?