Hardware

Where to start with the hardware? How about here: this is Sony's best-looking smartphone ever. Lacking any removable panel to access the battery meant that the Xperia Z's components could be squeezed together into a slender profile measuring a mere 7.9mm (0.31 inch) and weighing in at 146g (5.15 ounces). Thanks in part to the hidden ports, light is able to bounce off the phone's white sides. In short, it's a real beauty. It's worth noting that alongside the increasingly safe choice of black and white, there's also a purple edition -- one that our Spanish team got to play with.

Where to start with the hardware? How about here: this is Sony's best-looking smartphone ever.

But while it's certainly a looker, the expanse of that 5-inch screen and accompanying bezel mean that it isn't the most comfortable smartphone we've handled. Compared with the substantial Lumia 920, the Xperia Z is slightly taller, but it's easier to grip, thanks to that slimmer shape. Put differently, it feels more like the Droid DNA than, say, the Galaxy Note II. As we noted before, reaching the phone's upper edge is a bit of a stretch if you're using it one-handed -- we're hoping Sony's incoming Xperia ZL (with its smaller dimensions) will prove a little more manageable. Thanks to one very geometric silhouette, the phone is a little uncomfortable to hold after extended use, what with those sharp corners pressing into your palms. However, we had no problems sliding it into our pockets -- something we can't say of other phones with 5-inch screens.

That glass-coated backing brings the Xperia Z into such esteemed company as the Nexus 4 and iPhone 4S, although Sony has differentiated its design by extending these glass panels to the sides too. Both the back and front include a shatter-resistant layer (not Gorilla Glass), while a glass-fiber polyamide skeleton connects all those panels together. This skeleton rounds out the corners between the panels, which helps smooth those angles at least to some extent.

Two other notable features are the Xperia Z's IPX5/7 and IP5X ratings. In real terms, Sony says the phone can handle water up to a depth of one meter, and is resistant to guided water jets. It's also designed to steer away dust from the phone's more delicate parts. To access the micro-SIM and microSD slots, as well as the micro-USB and headphone sockets, you'll need to flip out the sealed covers. There's a rubber lining behind each one, ensuring the water's kept out. We tested it in bowls of water, the shower and even gave it a quick hose down, but none of this resulted in a panicked call to Sony requesting another review unit. The flaps also feel substantial -- we have no concerns about them breaking off after extended use. Heck, you could even lift the phone up with them (not that we suggest you do that). At the same time, opening these flaps is less laborious than pulling off a battery cover or battery to access a micro-SIM slot or SD reader.

While you won't have to open those flaps very often, you'll be accessing that micro-USB port pretty frequently. (Not to spoil our battery performance section, but the runtime isn't great.) With all those mechanical openings covered, it would have been nice to see some form of wireless charging, given that it's already out there on rival phones like the Lumia 920, Droid DNA and Nexus 4.

Thanks to those port covers, however, the phone's streamlined perimeter is interrupted only by the power button, which will look familiar to anyone that's turned on a PlayStation Vita. Just off-center along the length of the right edge, it's made of machined aluminum (like the volume rocker just below it) although you won't get a camera button this time around. This is apparently a sacrifice that had to be made to ensure the phone would be water-resistant, but it feels like a glaring omission just the same. The micro-SIM slot is on the same side, while a single loudspeaker sits on the bottom of the right side. Unfortunately, the speaker is tinny and, even on full blast, lacks punch during video playback.

On the left edge, you'll find the covers for microSD and micro-USB, plus contacts for an as-yet-unseen dock. Flip the phone over to the glossy (but fingerprint-prone) back, and you'll note the main 13-megapixel camera, flash and secondary mic. The lens is fortunately slightly recessed, which should defend it from scratches. When we pulled the phone out of its packaging, there was a removable NFC sticker, but otherwise there are only some Xperia branding and a few serial numbers at the bottom interrupting that white surface.

On the front, there's no white paneling (aside from a sliver of the side), with a black border instead framing the 5-inch screen. Up top, you'll find the front-facing 2-megapixel camera with Sony's Exmor R sensor -- and it also supports HDR! Below the screen, there's nothing beyond the phone's mic. The Xperia Z has on-screen buttons rather than any capacitive keys.

Display

While quite a few companies have announced phones with 5-inch, 1080p displays, the Xperia Z is still one of the first to arrive for review, if not the first. The phone beams out a resolution substantially higher than the Xperia T, and as dimensions have increased only slightly (4.6 to five inches), it offers a higher screen density of 443 pixels per inch. As we said during our Droid DNA review, while there's less of a leap from 720p to 1080p compared to qHD to 720p, that's not to say you won't notice sharper fonts, richer images and a crisper view of your photos.

Comparing the Xperia Z against the only other 1080p phone we've reviewed, the Droid DNA, Sony unfortunately comes in second place

Comparing the Xperia Z against the only other 1080p phone we've reviewed, the Droid DNA, Sony unfortunately comes in second place. Sony is calling its new, thinner display the OptiContrast panel, but its performance doesn't offer the same viewing angles, or outdoor performance, of HTC's Super LCD 3 screen. In fact, turn the screen away from straight-on viewing, and you'll see a grayish discoloring that starts to obscure what's going on -- especially under bright light. While Sony says the new display construction should reduce reflection, sunshine and certain lighting conditions often made it difficult for us to read even the home screen.

As we've also seen on Sony's mobile displays in the past, black backgrounds and detail often appeared more like a dark gray. If anything, the phone is often too bright -- the Xperia Z's brightness setting could do with a wider range of contrasts and a lower base setting. Not that we'd want to lose the brightest option, as while you won't have anything to fear from rain with the water-resistant Z model, we needed one of the top brightness settings to see what we were doing on the touchscreen when the sun came out.

This is the first phone to feature Sony's improved Mobile Bravia Engine 2, which is responsible for a host of contrast and sharpness enhancements to your photos and videos (whether they were recorded on the phone or downloaded from some other source). The software will tweak darker regions to be even blacker, while distortion from lower-quality videos from the likes of YouTube is also reduced -- videos did look marginally smoother. Conversely, there's also a sharpness filter for images, which boosts edges and contrast -- apparently without adding noise, either. The additions seem a bit more aggressive than on preceding Sony phones, and when we looked at our freshly captured photos we noticed an excessive bluish tinge on some of them, regardless of white balance selections. This doesn't appear to be tied to the Bravia tweaks (which can be turned off if you don't like your photos extra-saturated) and appeared substantially reduced when we viewed them on other device, like a PC.

Camera

It's the debut for Sony's new Exmor RS sensor. Promising improved signal processing, while matching the image size of the Xperia T (up to 12 megapixels); it's a whole new sensor. The standout improvement here is HDR video, offering a bigger dynamic range of lighting in your video capture. In practice, it works well. We test a lot of cameras, and the Xperia Z's new feature generally offered better light composition during our tests. Sometimes it overcooks colors, with a bit too much noise, but we'll definitely take that in exchange for the better light balance. Check out our sample video, taken in a dimly light underground tunnel.