Archos Diamond Omega: Full Test – Smartphone

Archos Diamond Omega: Full Test - Smartphone

                        With its Diamond Omega, Archos goes upmarket by offering a smartphone design and data sheet that have almost everything great. But the selling price is also higher than usual for the brand, which is not without risk in a context of tough competition.

    Archos is a brand already well established in the landscape of entry-level smartphones in France. It has also become popular in recent times with mid-range models manufactured by Nubia, a subsidiary of the Chinese manufacturer ZTE. A bit like Honor for Huawei, but on a smaller scale, Archos is the Western counterpart and the gateway to a company from the Middle Kingdom. Thus the Diamond Omega is none other than the French version of the Chinese smartphone Nubia Z17S.

Archos Diamond Omega

With a price of € 500, the model faces the OnePlus 5T which is already experiencing some success. And precisely, Archos would surely walk in the footsteps of the Chinese manufacturer OnePlus, who has won against the behemoths of the market. Can the Omega do it?

Diamond Omega is part of the high-end and this is expressed, for starters, by the care taken in the design of the device. The metal gives way to a back made entirely of glass that offers the Omega more elegance than previous models of the brand. Brilliant and pleasant to the eyes, the Omega does not escape the back of this material, namely the many fingerprints that do not fail to cover it quickly. The screen occupies 81.7% of the front area, not far from the 83% of the Samsung Galaxy Note 8 and ahead of the OnePlus 5T (80%) and the LG V30 (80.5%), for example.

The brilliant back of the Archos Diamond Omega is sensitive to fingerprints.

The handling is unfortunately not exempt from reproach. The Omega is indeed rather heavy (170 g) and not especially very thin (8.5 mm), while its hard edges and salient are quite unpleasant.

A Type-C USB port for the Archos Diamond Omega, but no mini-jack.

The fingerprint sensor is placed at the back, so that the index finger falls directly on it by taking the smartphone out of the pocket. It is unfortunately not the most reactive and sometimes it is necessary to be patient and start again, or even turn to the entry of a code or the tracing of a diagram to unlock its screen.


The Diamond Omega offers a 5.7-inch screen a little more than Full HD (1080 x 2040 pixels), IPS technology. The pixel density reaches 403 dpi. While the trend seems to be on the edge-to-edge screens with a ratio of 18: 9, even for the less prestigious ranges (Honor 7X, Wiko View, OnePlus 5T), Archos has chosen a ratio of 17: 9. The format is a little less stretched in height.

            Delta E = 2.8

The contrast reaches 1,108: 1 and the temperature of the screen is far too cold with its 8,061 K. However, the colors displayed are quite close to the ideal colors, since we note a delta E of 2, 8, below the threshold of 3 under which the human eye does not distinguish between the expected colors and those actually displayed. To achieve this result, it is necessary to take a turn in the parameters to increase the temperature of the colors as much as possible. Without this, the temperature peaks at 9,571 K and the average delta E is 3.1. For its part, the maximum brightness reaches 453 cd / m² and the rate of light reflection is maintained at 9.79%. Thus, even in full sun, the screen keeps a good readability. Its minimal brightness of 0.4 cd / m² can not dazzle in the dark.The Diamond Omega, however, suffers from a touch delay of 150 ms and a persistence of 22 ms. Relatively high values ​​that penalize the reactivity of the display.

Archos has focused on the performance of its Diamond Omega, wishing to justify the price of its smartphone. We find a device with the latest high-end mobile chip from Qualcomm, the Snapdragon 835, coupled with 8 GB of RAM. A chip that can be found in the most powerful smartphones – and expensive – like the Razer Phone, but also in a certain OnePlus 5T. This configuration offers a good fluidity and allows to run several gourmet applications simultaneously without problem.

Temperatures during CPU + iGPU solicitation (left, rear panel, right, front panel)

The heat of the device is quickly felt between the hands, which can become quite unpleasant after a while. This happens when it is in high demand, during our thermal test that tests both the CPU and the GPU, of course, but also in video-intensive games such as Asphalt Xtreme. The temperature can rise to 31.6 ° C. Even if the temperature displayed is not so high, the heat tends to spread very quickly through the glass shell, which can be unpleasant.


As for the video game, precisely, the Diamond Omega offers a good fluidity with optimal graphics settings. We can enjoy gourmet 3D titles without any problem.

Unfortunately, connectivity side, it will be necessary to do without the port mini-jack 3.5 mm. Even though Archos includes a USB Type-C adapter to the mini jack, it's difficult to find a real justification for this absence, since the thickness of the device could largely accommodate the latter. It is also not its light battery of 3100 mAh that can explain this choice. This is certainly more of a marketing element to replace Archos in the race for "innovation" technology. Our test is therefore on this adapter, which is doing pretty well. The power is at the rendezvous and allow you to pair the phone with any listening equipment without problems. The distortion is for its part very well contained. The separation of the channels is clean and only the dynamic fishing a little. Be careful to disable the "sound optimizations" to enjoy a signal without artifacts.
The only speaker located on the lower edge comes out a brilliant sound, a little aggressive and devoid of bass, as is often the case. In short, we will avoid using it for anything other than calls.

The photo part is the main defect of this Diamond Omega. Just like the Diamond Alpha before him, our lab has pinpointed the significant presence of noise. And even in so-called optimal conditions, with good brightness, the camera does not offer a convincing result. If you compare it with its main opponent in the market, the OnePlus 5T is all the more obvious. The level of detail is less important, the contours are less pronounced and the contrast is less pronounced
In low light, the gap between the two competitors is widening. And yet, the OnePlus 5T had disappointed us in these conditions. Diamond Omega suffers from constant noise in these conditions. That is, the readability of the pictures is very bad, polluted by noise. The details are almost indecipherable. As we explained to you recently, we are starting the lab tests of the frontal sensors. The current reference – and one of the exceptions – is at Samsung, which offers a convincing front-end module on its Galaxy Note 8. The latter does not display much sharpness, but prefers a softer treatment for a result then never equaled . As for Diamond Omega and its 5 megapixel sensor duo, the details are pretty scrambled, the effects of textures significantly diminished – if not absent – and the noise is all the more present. For self-portraits, where the requirement is not as severe by its nature very oriented social networks, Diamond Omega offers nothing catastrophic, but remains well below what offers the competition.

Submitted to our SmartViser Autonomy Test, the Diamond Omega held 13 hours and 37 minutes.
With a fairly basic daily use, the device can hold a good day. This is not impressive, but it remains satisfactory for a smartphone with a battery of 3100 mAh. It remains behind its rivals OnePlus 5 and OnePlus 5T in our ranking of the results of the SmartViser test, without being too withdrawn. Good news all the same, it is compatible with the Quick Charge 3.0 Quick Charge from Qualcomm.


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