Sony Xperia Z5 special edition has a 4K screen

The Sony Xperia Z5 hasn't even been officially announced yet but that doesn't mean the rumour mill can't cough up some interesting specs.

The latest suggests that there will actually be two different versions of the phone. There's the 5.2 inch regular model and a 5.5 inch 'Premium' version. And that larger model will be the first smartphone in the world to come with a 4K screen. That's right - 4K resolution as in the kinds of images you're seeing on the highest of high end TVs!

It will have over 800 pixels per inch - hundreds more than the best phones on offer today. That's impressive stuff. And there's reason to believe the rumours as well because they come direct from the source via a leaked video featuring a marketing director from Sony Mobile.

The video has since been removed but it also showed off the 23 megapixel rear camera which has blazingly fast autofocus and a decent 5x zoom. The Z5 also promises to bring a fingerprint reader to the range for the first time, in a lush metal and glass body.

Top hardware iside adds up a pretty impressive package. This isn't official word as yet so stay tuned for more from IFA 2015.