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World’s thinnest smartphone. That’s the claim made by the Galaxy S25 Edge. Samsung gave us a thrilling keynote experience in January that is seldom encountered.
Revealed at the end of Galaxy Unpacked, the Galaxy S25 Edge had been kept well away from rumors and leaks. It emerged as a sensation, overshadowing the other S25 models that were introduced.
A few months later, it’s a reality, now in our hands. A smartphone that’s only 5.8 mm thick and weighs just 163 grams. A technological feat that didn’t come without sacrifices. Despite all the engineering efforts, it was impossible to incorporate the same components as other smartphones.
In the end, the technical specifications of the Galaxy S25 Edge are compromised in terms of its battery and camera—two crucial aspects, especially for a smartphone priced at 1249 euros.
Samsung Galaxy S25 Edge Specifications
| Model | Samsung Galaxy S25 Edge |
| Dimensions | 75.6 mm x 158.2 mm x 5.8 mm |
| Manufacturer Interface | One UI |
| Screen Size | 6.7 inches |
| Pixel Density | 500 ppi |
| Technology | AMOLED |
| SoC | Qualcomm Snapdragon 8 Elite |
| Graphic Chip | Qualcomm Adreno 830 |
| Internal Storage | 256, 512 GB |
| Rear Camera | Sensor 1: 200 MP Sensor 2: 12 MP |
| Front Camera | 12 MP |
| Wi-Fi | Wi-Fi 7 (be) |
| Bluetooth | 5.3 |
| 5G | Yes |
| NFC | Yes |
| Fingerprint Sensor | Under the screen |
| Connector Type | USB Type-C |
| Battery Capacity | 3900 mAh |
| Weight | 163 g |
| Colors | Black, Silver, Blue |
Samsung Galaxy S25 Edge Design
It’s thin, very thin, and ultimately quite slim. That’s what physically sets the Galaxy S25 Edge apart from its peers, the Galaxy S25, S25 Plus, and S25 Ultra.
Same flat edges, same uncurved faces. But the physical uniqueness of the Galaxy S25 Edge isn’t just about its thickness. No, the other distinctive element is its camera module.
Always positioned at the top left of the rear face, it appears as an islet. A large pill that groups two lenses, each ringed in the same tone as the finish of the device, blue in the case of our test model.
While it’s well-finished, one cannot ignore the disruption between the thin line of the S25 Edge and this photographic protrusion that significantly detracts from the thinness attributed to it. From 5.8 mm, it jumps to 10.2 mm!
And there, the magic loses a bit of its luster as it turns into a real tumbler if mishandled when placed on a hard surface.
Beyond this physical consideration, it’s also worth noting that with too-tight jean pockets, the camera module will likely snag when you try to stow away the S25 Edge. These are minor inconveniences that one must deal with to enjoy the 5.8 mm of the rest of the casing.
As for the finishes, they are almost impeccable. While nothing protrudes, not everything is centered. It’s not the case with the Samsung logo as on previous models, but it is the case with the USB-C port. It’s centered in width, but not in thickness. Another compromise made to fit everything inside.
The black border of the screen, on the other hand, is perfectly symmetrical and especially a tad thinner than on the Galaxy S25 Plus, due to slightly reduced overall dimensions (we’re talking tenths of a millimeter).
For durability, you can rely on a titanium frame, which is stronger than aluminum. On the back, there’s Gorilla Glass Victus 2, just like on the S25 Plus. The front is where it differs, as it uses Gorilla Glass Ceramic 2, which offers increased resistance to impacts and scratches thanks to the integration of ceramic crystals, allowing for a thinner design and better management of cracks. The whole package is completed by an IP68 certification that protects the S25 Edge from water and dust.
Samsung Galaxy S25 Edge Screen
The screen of the Galaxy S25 Edge is, on paper, identical to that of the S25 Plus. 6.7 inches, 120 Hz LTPO, HDR10+, QHD, everything is shared.
So, we still have a large screen that, as mentioned earlier, does a good job of limiting its black border. This enhances immersion and adds to the premium feel.
But what we’re interested in is the performance of this display. The Galaxy S25 Plus was not a very good pupil in terms of color fidelity.
We therefore subjected the S25 Edge to our protocol on the CalMAN Ultimate software by Portrait Displays.
There are two colorimetric modes available: natural colors or vivid colors. The former is the one that yields the best results.
Armed with our probe, we recorded an average DeltaE of 4.95 in SDR. While it does better than its older sibling, the S25 Edge is still far from the truth, with the target value being 3. Beyond this, one can see the color drift.
In HDR, it’s worse than the S25+ and almost reaches 7 for a desired value of less than 6. As you can see, even in “Natural” mode, Samsung’s slim smartphone is not the best companion for online shopping.
It makes up for it with the white point, with a slightly too warm temperature, but still close to 6500 K with 6257 K measured.
Where it really excels is in its maximum brightness. In both SDR and HDR, it surpasses the S25+ with 1368 nits in the former and 2430 nits in the latter. These are very good values that guarantee its use with ease in bright sunlight.
Samsung Galaxy S25 Edge Performance
Samsung wasn’t going to skimp on everything and installs the Snapdragon 8 Elite, shared with the rest of the S25s, in its ultra-thin smartphone. It is paired with 12 GB of RAM like the others.
In terms of performance, one would expect the best from Qualcomm’s top processor. We launched our usual benchmarks, and the results meet our expectations.
For short durations, it holds up even though it is still the least performing smartphone with an 8 Elite in the group.
In real use, it shows no slowdowns, and thankfully so. Navigation is smooth, and the comfort of its lightness is particularly appreciable, once again.
In gaming, it performs well. We maintain 60 fps even in combat, with all graphics options pushed to the maximum.
However, it gets complicated when it’s heavily demanded over time. Then, it shows signs of fatigue as our stress test shows. It loses 35% of its power in less than 10 minutes. The reason is likely a cooling system that’s too cramped inside this chassis. Struggling to cool its SoC, it throttles it to help lower the temperature.
If it’s not a problem today since this S25 Edge is perfectly operational in 2025, it could be lagging in a few years, alongside other smartphones of the same generation that manage heat dissipation better, like the Magic 7 Pro from Honor, for example.
On the other hand, we can also note that it doesn’t heat up externally. And that was one of our concerns. Its hottest point, after an hour of gaming, is only 45°C. It remains localized and is entirely bearable.
Samsung Galaxy S25 Edge Software
Not much to say about the software part of the Galaxy S25 Edge. Everything has already been said with the Galaxy S25s that share exactly the same version of One UI 7. For a detailed presentation, we refer you to our very complete test of the Galaxy S25 Ultra.
It’s worth noting that the Galaxy S25 Edge benefits from the seven years of updates put in place by Samsung on its high-end models. This duration is valid for both major and security updates.
We can advance to say that it will receive Android 16 by the end of the year through One UI 8, which we expect to be presented at the announcement of the Galaxy Z Fold 7 and Z Flip 7 in July 2025.
Samsung Galaxy S25 Edge Camera
Photography is a big part of the Galaxy S25 Edge. This area has seen one of the major cuts in the technical specifications of the S25 Edge.
We dissect the photo performance of the Samsung Galaxy S25 Edge in a dedicated paper that we invite you to consult. Here’s what we retain.
In such thinness, it was impossible for Samsung’s engineers to fit three sensors including a telephoto lens. The choice was therefore made to reduce the number of lenses to two:
- a stabilized 200 MP wide-angle lens (that of the Galaxy S25 Ultra), f/1.7, 24 mm equivalent, 1/1.3″, 0.6µm,
- a 12 MP ultra-wide-angle lens, f/2.2, 13 mm equivalent, 1/2.55″, 1.4µm.
The idea here was to replace the optical zoom of the S25s with the huge 200 MP main sensor of the Galaxy S25 Ultra. With such a resolution, it is true that one can crop within the shots without too much loss, on paper.
But at 1249 euros, it’s hard to be satisfied with a half-configuration. We wanted to test the Galaxy S25 Edge by putting it up against its direct competitor in terms of photography, the Galaxy S25+.
And the result is quite good. In broad daylight, its main sensor provides absolute sharpness in x1 photos, with a high level of detail. It also excels in low-light portrait performance, a domain where it particularly shines.
However, the choice of an ultra-thin design has imposed notable concessions, especially in terms of versatility. Lacking a dedicated telephoto lens, it must rely entirely on digital zoom. Compared to a device like the S25+ and its x3 optical zoom, the S25 Edge is logically less reliable and qualitative as soon as one wants to get closer to their target. Similarly, its overall night mode processing, although good, seemed a notch below the accuracy offered by other models.
In short, the Galaxy S25 Edge is a good camera phone for the user who prioritizes the sleekness of a design and who rarely zooms. If you are looking for maximum sharpness for your everyday photos and portraits are your playground, it will satisfy you. However, for photographic versatility to withstand all tests, its lack of a dedicated optical zoom will likely be felt.
Samsung Galaxy S25 Edge Battery
Here’s the second major problem of the Galaxy S25 Edge, its battery. From 4900 mAh on the S25+ of the same size, we go down to 3900 mAh on the Edge. 20% less capacity for the same chip and the same screen size, that must significantly affect battery life.
And it does not disappoint. The Galaxy S25 Edge is far from good in this regard. In our new protocol designed in partnership with SmartViser, we measured 14h19 while the Galaxy S25+ manages to hold 19h15 on the same scenario.
This scenario replicates an updated use of a smartphone, combining audio streaming, video, gaming, web browsing, social networks, calls both in cellular and Wi-Fi, and downtime.
In real-life situations, this represents a day’s use, barely. Unplugged at 7 am, it would be empty by 9 pm…
And that was the case during a rather intense day in Italy. Using the camera and navigation, it held up for less than a day of sightseeing.
Yet, we learned that Samsung had worked on this issue and had not just settled for a smaller battery. No, the Korean manufacturer developed a new technology to boost the energy density of its S25 Edge. In the end, this is better than that of the S25 Ultra. It must be understood that Samsung managed to integrate more capacity into a confined space. In comparison, if they had used silicon carbon technology, we would have had 4170 mAh according to IceUniverse, a minimal difference. The problem lies rather in the choice of an ultra-thin smartphone.
And one might think, well, just charge it quickly during the day. Yes, but no, it won’t be quick since—and this is incomprehensible—the S25 Edge is limited to 25 Watts in wired charging while the S25 Plus climbs to 45 Watts…
Here are the results of the two devices. The difference is reduced for the 0 to 100%, but the in-between significantly widens the gap and it’s not flattering for the newcomer.
Samsung Galaxy S25 Edge Audio
Despite its great thinness, the Galaxy S25 Edge has some power. It features stereo speakers, as usual, positioned on
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Maya Singh is a senior editor covering tablets and hybrid devices. Her work explores how these tools reshape digital productivity and learning. She also contributes to feature editorials on emerging tech.