Fortunes can change fast in the smartphone market. As recently as 2011, the market share ranking of leading smartphone vendors, in terms of units shipped, looked like this:

 Data source: IDC

Apple and Samsung are still major players, but where are the others?

In April 2014, Nokia sold its mobile phone business to Microsoft, which subsequently formed the Microsoft Mobile division and removed the Nokia brand name from flagship Lumia devices. Recent Microsoft Mobile developments include planned layoffs of 7,800 workers, a $7.6 billion write-down o ...

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