We knew that someday someone would put a 4K display into a smartphone Marc-Andre Ter Stegen Jersey , but it was still a surprise when Sony introduced the new Z5 Premium at IFA. Since Apple has coined the name of the retina for its displays, there is some discussion about how sharp a screen really needs to be. What is the limit of the human eye? Is it useless to move the pixel density beyond a certain point? It's hard to say for sure, because the clarity of a picture has a lot to do with the distance you look at it from, and with smartphones we all like to get up close.

Specs aside, what does it look like? It's strikingly perfect, but it's not immediately obvious that it's a 4K display. Only up close can you get an idea of how sharp this screen is. You can put it as close to your eyeballs as you want and you will not be able to detect any hint of pixilation. But look at it with a 1080p display side by side Lucas Hernandez Jersey , and the difference is strong: the colors are lush, the detail is impressive, and you get a deeper sense of depth.


The XPERIA Z5 Premium is the actual flagship of Sony and therefore possibly differs by the mirrored back of the regular XPERIA Z5 and Z5 Compact. You can get the Z5 Premium in black, chrome or gold, and you'll find that mirror effect on each one. It's an expensive look and it's classic, but it's obvious that dirty fingerprints are inevitable. If you want your Z5 Premium to retain that seductive look Koke Jersey , you'll want to carry a microfiber cloth with you. In terms of size, this display is 5.5 inches tall, but it does not feel much bigger than in previous XPERIA Z releases, as the face is more off the screen and the apertures have become smaller. At 180 g, it's also pretty light, and it's nice to hold and put in your pocket.


Fingerprint Sensor and Snappy Shooter:


Next to the 4K screen Juanfran Jersey , there are two features that Sony emphasizes in the soffit: the fingerprint sensor, which is also the on off button on the right edge of the phone, and the 23 megapixel camera, which will be the fastest camera in one should smartphone, which can focus and snap in fractions of a second. The fingerprint sensor is absolutely great. This is a very quick way to unlock your phone, and you can do it easily with one hand Jose Gimenez Jersey , which is not always the case with the Touch ID or the Samsung Home button. The camera is a little harder to test, but it's definitely fast, responsive, and seems to take high-quality photos. Although the large sensor is designed for 23 megapixels, it is reduced to 8 megapixels. This allows you to enlarge photos without losing all details.


Hot stuff:


Heat and battery life are obvious issues for the Z5 Premium. A 4K display requires a lot of processing power and juice to keep it running. The phone includes a 64-bit Qualcomm Snapdragon 810 processor with 3GB of RAM under the hood. In the early versions of the 810, there were problems with overheating Jan Oblak Jersey , and Sony had problems with earlier XPERIA Z phones, especially with 4K recording. I found the Z5 Premium did not go very hot when I used it. Recording video has definitely raised the temperature, but it has never reached unpleasant levels.


Sony has used a hefty 3,430 mAh battery in the Z5 Premium. When I got on the power management side and had a look at the battery usage, I could see that the demo model was running flat all day and a few hours in the morning yesterday and was 21 percent in the tank. Maybe a few days between charges, even with the 4K display Gelson Martins Jersey , is not a dream.


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