It's hard to argue with the fact that the Samsung Galaxy S9 is the hottest launch of 2018. Coming immediately after the Galaxy S8 - which was considered by many critics (IT Pro included) to be the best phone of last year - the S9 has some pretty big shoes to fill.
On the surface, however, there's not much to differentiate the S9 from its immediate predecessor. The physical design is all but identical, and looking at the spec sheet, it's hard to pick out any particular improvements that would give it a significant edge (no pun intended) over the S8. There are a number of improvements and tune-ups, to be sure, but no big, headline features to shout about.
Samsung Galaxy S9: Design
The Galaxy S8 was a pretty radical reinvention of Samsung's design formula, so the prospect of the company making another major change immediately afterwards was fairly unlikely. Sure enough, the Galaxy S9 is the spitting image of its predecessor, save for a few minor tweaks.
First and foremost, the fingerprint sensor has been slightly repositioned, moving from its previous place beside the camera to just underneath it. While we never had any particular problems with it, we know some users had issues with accidentally putting their fingers on the camera lens and smudging it - a minor issue that this change will hopefully address.
Aside from that, Samsung has - somehow - managed to make the Galaxy S9's top and bottom bezels even thinner. It's only a tiny reduction (after all, there's hardly anything to shave off) but the screen-to-body ratio is even more impressive than the Galaxy S8. The dimensions are virtually identical, too. Measuring 8.5mm and 163g, it's half a millimeter thicker than its predecessor and 10g heavier, but the difference is beyond negligible. It's still thin, light and lovely. It's not the slimmest phone on the market, but thanks to those gorgeous, tapered edges, it feels like it is.
This isn't a criticism, though; the Galaxy S8 is hands-down the best-looking phone on the market, so the fact that Samsung hasn't decided to reinvent the wheel is actually something of a relief. Instead, they've made a series of small, sensible adjustments to refine an already near-perfect package. It also now comes in purple, in case that's the kind of thing that floats your boat.
Samsung Galaxy S9: Display
Likewise, the S9's screen is also a dead ringer for the one carried by its predecessor, with a 5.8in (or 6.2in in the case of the S9 Plus) QHD+ Super AMOLED panel and an aspect ratio of 18.5:9.
As with the design, there's little to complain about - Samsung's choice to stick to a 2,960 x 1,440 resolution is a smart one, ensuring that the display is crisp without being an unnecessary drain on the battery. Just like previous devices, you can swap between three resolution settings - 1,480 x 720, 2,220 x 1,080 and the aforementioned 2,960 x 1,440 - on the fly. It's set to the middle resolution by default, so if you want the absolute maximum in fidelity, you'll want to go into the settings and change it.
Samsung's displays are universally top-notch, so it's no surprise that the S9 is an absolute stunner in terms of visual quality. Our tests showed an almost perfect score of 99.3% when we measured its coverage of the sRGB colour gamut, and contrast is even better, with a flawless rating of infinity:1. There are a number of different screen modes to choose from, including adaptive display, AMOLED cinema, AMOLED photo and basic. For our money, the adaptive mode is the most attractive and vibrant, although images can look slightly overexposed.
Brightness is very good too, although we'd recommend that you leave the automatic brightness switched on; with this setting disabled, we measured the maximum brightness at a respectable but middling 299cd/m2. When we switched the automatic brightness on, however, we clocked the screen at a blazing maximum of almost 1,000cd/m2.
The other big change for the display is software-based; the S9's whole user interface is now able to rotate, meaning you can use the phone in landscape mode at all times, if that's what you'd prefer.
Samsung Galaxy S9: Specs and hardware
So, looking at the S9's exterior, not much appears to have changed - but what's happening under the hood? In the UK, the S9 uses Samsung's latest Exynos 9810 CPU - roughly equivalent to the Qualcomm Snapdragon 845 gracing most of its rivals - and 4GB of RAM. While this may not sound like a particularly significant upgrade, the results are startlingly impressive.
In the Geekbench 4 performance tests, the S9 not only managed to outpace the S8 by 25 percent and 45 percent in multi-core and single-core operations respectively, it's even catching up to the mighty iPhone 8 - Apple's latest flagship is less than 20 percent faster for both single and multi-core processing, which is testament to just how jaw-droppingly fast the Galaxy S9 is. Naturally, it can also handle 3D gaming with as much aplomb as any other flagship (and indeed most laptops).
Is all this power necessary, though? The S9 is undeniably a beast of a smartphone, true, but then so was the S8. Considering that the S9's predecessor was able to power a full desktop environment with little lag or slowdown, is better performance really going to make that much of a difference to all but the most demanding of power users? Probably not - but still, it's nice to have the extra headroom, and you can be sure that this phone will still feel zippy and responsive in two years time, or even more.