After treading water for several years, Sony decided to do some innovating and at IFA earlier this month the company launched the Xperia Z5 Premium. That handset was the first to arrive with a 4K screen that boasts a stunning 2160 x 3840 resolution and 800+ ppi. To put that in perspective, the nearest rival is the Samsung Galaxy S6 with a 577ppi pixel density.
Read the full story here.