New 5.5in phablet has four times the number of pixels of an iPhone, and beats rivals Samsung and LG on display sharpness

Sony has skipped 2K and gone straight to 4K for the launch of the world’s first UHD 4K smartphone, which has four times the number of pixels of Apple’s iPhone 6 Plus.

The new Xperia Z5 Premium “super flagship” smartphone has Sony’s new 5.5in 4K display, which has a pixel density of 801 pixels per inch (ppi), and leads a new range of Z5 series smartphones.