Sony Xperia XZ Premium review: Smartphone 4K remains silly, but the phone itself is super

Back in 2015, I reviewed the Sony Xperia Z5 Premium. What made it premium, according to Sony, was its 4K screen at a time when almost all screens on smartphones were 1080p, and a handful were 2K. It was silly, especially given that it only worked in 4K mode for two Sony apps; YouTube and Netflix’s Android apps didn’t support mobile 4K. Even if they did, the awkward truth is that you don’t have magic eyes: you can’t see the difference between 4K and 1080p on a screen that small.

After a brief return to common sense last year with the Xperia XZ, Sony has decided to treat us with another of its “magic beans” devices. It’s not quite as daft as it was back in 2015, though. In the intervening 18 months, smartphone prices have shot up, and the £650 price tag now looks less unhinged than £599 did back in 2015. Plus, while the Xperia Z5 Premium was – aside from the screen – essentially the same as the Z5, the Xperia XZ Premium delivers a substantial speed boost over the regular Xperia XZ.

But that still leaves us with a brilliant smartphone with a silly screen.

Sony Xperia XZ Premium: Design

Say what you like about Sony, but it has a style, and it sticks to it. While the likes of Apple, Samsung, HTC and LG have rattled through different aesthetics practically every generation, Sony has stuck with its original formula: sharp angles, squared edges. Reassuringly chunky.

That’s not quite the whole story: there are slight design changes, but they really are slight. The long edges are more curved than the previous model, while the top and bottom of the phone are more severely square, leaving behind sharp corners that have a nasty habit of digging holes in your pockets. But this is distinctively a Sony design, which remains oddly impressive in a world of me-too designs, whether you’re a fan or not.

Even if you aren’t seduced by its looks, you can’t fault Sony for getting the basics right: the Xperia XZ Premium is IP68 water-resistant; it has a microSD slot; and its fingerprint reader is positioned on the right-hand side, integrated with the power button. In my view, that’s the best place for it. There’s even a dedicated camera button and, happily, room for a 3.5mm headphone jack. Take note, HTC, Apple and Motorola.

Sony Xperia XZ Premium: Screen

But let’s talk about the screen, because that’s the main attraction here. At the risk of sounding like a stuck record, 4K is silly on a 5.5in display. It’s silly because your eyes can’t tell the difference between pixels that small. It’s silly because there’s precious little 4K content for Android. It’s silly because it drains the battery.

That last point also means that Sony doesn’t run the phone in 4K most of the time: just an upscaled 1080p. Which in turn generates another silly point: if it’s not dazzling enough to bother with 90% of the time, is it really worth it for the handful of cases when it can be used? “It’s great for virtual reality,” I hear you cry. Sure, but VR games aren’t rendered in 4K anyway.

Did I mention it was silly?[gallery:4]

It’s a white elephant of a feature if ever I saw one. The Emperor certainly has a fine set of new threads, though, judging by the number of commenters who told me I was wrong about this last time around. And if you care about bragging rights, a pixel density of 807ppi can’t be beaten.

Despite the pointless resolution, the screen stacks up rather well. It’s an LCD panel rather than AMOLED, but it’s still a fantastic performer. It’s sharp, bright and vibrant. Brightness goes up to a very solid 524cd/m2 and the contrast ratio is great at 1,116:1. When Netflix and Amazon get around to supporting HDR through their mobile apps, the Xperia XZ Premium will be there to take advantage, too.

Sony Xperia XZ Premium: Performance

But as I hinted at in my introduction, an entirely superfluous 4K mode doesn’t make this a dead duck as it did the Z5 Premium back in 2015. While the Z5 Premium was just a Z5 with a slightly bigger 4K screen, the XZ Premium gets a shot in the arm across the board: it goes from a Snapdragon 820 processor to a Snapdragon 835, and gets a whole extra gigabyte of RAM for its troubles. The base model also has double the storage of the regular XZ, at 64GB.[gallery:5]

The result is a phone that, unsurprisingly, feels buttery smooth to use. The Qualcomm Snapdragon 835 chip is the same one currently moonlighting in the excellent HTC U11 and the even better (US version of the) Samsung Galaxy S8. This makes it the phone a pleasure to use but, crucially, also puts the handset in very good company when it comes to benchmark results.

So, basically the same as the HTC U11’s performance, and a whisker behind the Samsung Galaxy S8. But what about graphical oomph? On paper, that’s a clear win for the Sony Xperia XZ Premium, but the devil is in the details. The Xperia runs at an upscaled 1080p, as we’ve already established, while the Samsung and HTC flagships run at native 2K resolutions. The irony here is that Sony’s score is better on paper precisely because the 4K phone outputs at a lower resolution than its rivals (although you can dumb down the resolution on the S8 if you want better performance). The “offscreen” result, which runs the same test at 1080p, shows there’s not much between the main players, however.