I am happy that I had a chance to hold and check the world's first smartphone with 4K display. Here's my hands-on with the Sony Xperia Z5 Premium.
The placements of the front and back views of Sony Xperia Z5 Premium are the same with the Sony Xperia Z5 except for that 4K display. The back is kinda shiny so expect to have some finger prints (and bring a wiper once you have it on the go)
The top has 3.5 mm. audio jack and noise-cancelling mic; lanyard slot and micro USB port at the bottom.
I was not able to shoot some pics of this part but I saw that the Z5 Premium is compatible with Sony's own MHL cable which enables you to put in your 4K content from the device to a 4K TV (of course, they had a Sony 4K TV on site) and it produce a nice video output.
And the camera sample:
Sony Xperia X5 Premium 23 MP rear camera sample
Sony Xperia Z5 Premium will be available in the country this December 3 but there will be a pre-order promo this November 6 to 22 which you can get a number of freebies. No info yet on it's official SRP.