16 mobile market statistics you should know in 2016

4 inch is the most popular screen size

The latest DeviceAtlas statistics on the most popular screen sizes show that 4 inch phones are the most popular in most countries including the likes of UK, France, Germany, Italy, Australia, Japan and USA. This is caused by the huge popularity of iPhone 5 and 5S.
https://deviceatlas.com/blog/16-mobile-market-statistics-you-should-know-2016