Hi - according to the financial press:

https://www.google.co.uk/amp/s/amp.ft.com/content/77af96e4-3edb-11e7-9d56-25f963e998b2

Samsung currently holds the world’s largest share of global smartphone sales - but there is considerable pressure from manufactures based in China.

You may want to research more recent press clippings.

Hope that helps 😊