Test OnePlus 6T: successful comeback for the Chinese manufacturer


Comme as usual, OnePlus was quick to renew its top-of-the-line phone, about 6 months after formalizing the previous one. The much-anticipated OnePlus 6T thus replaces the young 6 by correcting its small youthful defects and has the delicate task of competing with the Galaxy S9, Note 9, Huawei Mate 20 Pro and otheriPhone Xs of this world. All this of course for a price defying all competition, so as not to betray the philosophy of OnePlus.

Vendu starting at 559 €, the 6T is a little more expensive than its predecessor, which has been the case for several generations already. But at a time when ultra high-end phones no longer hesitate to exceed the €1,000 mark, the price of the 6T remains extraordinarily low in view of its technical specifications. Indeed, the smartphone integrates a Snapdragon 845 chip, a 6.4-inch Oled screen and 6 GB of RAM. On paper, this new "flagship killer" has everything it takes to shake up the competition.


An screen that occupies 86% of the front with a minimal notch.

Mais Beyond the raw features, has OnePlus found the recipe for success in a crowded market? That's what we're going to see.

Ergonomics and design

Les Generation "T" smartphones at OnePlus, like the "S" smartphones at Apple, do not really offer the opportunity for aesthetic and ergonomic upheaval. The 6T looks almost as good as its predecessor, which is not necessarily a bad thing since we were already pointing out the success that OnePlus 6 was 6 months ago. The design is simple, but effective, and the finish is always impeccable.


"Matt" glass back of the OnePlus 6T, on which the light draws a very light "S".

manufacturer markets two versions of its 6T, one with a glossy glass back (similar to the OnePlus 6 we tested), the other with a matte smoked glass finish. Our preference is for the latter, both from an aesthetic point of view (it is less prone to fingerprints) and from an ergonomic point of view (the smoked glass has a very pleasant "gummy" appearance under the fingers). But whatever the finish is, and even though it is imposing - forget the one-handed use - the device is rather successful.


6.4 inch 19.5:9 screen is clearly not designed for one-handed use.

minimal drip notch allows the screen to occupy 86% of the front of the device. The optimization work performed by OnePlus is quite impressive and it's a pleasure to essentially have only one screen in your hands.

Impossible by the way, to talk about the screen without immediately talking about what's behind it, namely the fingerprint reader. OnePlus was overtaken by Huawei on the first use of this technology, but the "wow" effect is still there... when recognition works well. Indeed, the fingerprint reader is a little more erratic on the OnePlus than on the Mate 20 Pro, sometimes failing to recognize a registered finger or taking a long time to unlock the phone. It is advisable to pair this security method with facial recognition - which is very fast - for an optimal experience.


- sometimes capricious - fingerprint sensor is placed under the screen.

the only thing that prevents the mobile from earning a fifth star is the lack of any waterproof certification. Of course, OnePlus promises us that its mobile is just as waterproof as the other top-of-the-range mobiles, but without certification, we prefer to remain cautious. On a technical level, apart from the uncertainty as to whether or not it is actually waterproof, the 6T has almost nothing to reproach itself with: USB-C port, NFC chip, dual SIM... One regrets nevertheless the absence of a wireless charge and a mini-jack port (we'll come back to this controversial point in the audio section).


Cela has been proving for some time now that OnePlus has mastered Oled, and the 6T is still a fine example of this know-how. The mobile's slab, in addition to being impressive in size, makes for a satisfying experience.

Les fans of vibrant colors can opt for the "default" screen calibration, while those who prefer more natural tones can take advantage of the sRGB mode. The sRGB mode offers impeccable colorimetry, with a delta E of 2.6 - below 3, the eye can no longer distinguish possible color drifts -, while the color temperature peaks at 6,873 Kelvin - close to the expected 6,500 K.


La mini notch that houses the front camera.

Question readability, no worries either. With a maximum brightness of 510 cd/m², the 6T can remain readable even when the sun is shining on the screen. The minimal reflectance of the slab also makes it possible to take advantage of the mobile in all circumstances. Finally, with 1.8 cd/m² of minimum brightness, the phone will not blind night-time mobile users.

À the use, the 400 pixels per inch allow a very comfortable navigation with clean images and chiseled characters. Who said mobiles need 4K displays? The persistence, on the other hand, is zero - thanks to Oled technology. The tactile delay is a bit too high for a high-end mobile (101 ms), but doesn't disturb too much the daily use.


Marque history of technophiles, OnePlus knows that its audience is intractable when it comes to performance and has therefore put all the chances on its side with a Snapdragon 845 chip associated with 6 or 8 GB of RAM, as well as an Adreno 630 GPU. All the ingredients are there to ensure a perfect experience, and it works. The 6T never hesitates before launching an application, never slows down when using it, you switch from one app to another in the blink of an eye. A real pleasure.


La heats up very reasonably 6T after 10 minutes of photo capture and vidéo

For don't spoil anything, even with all that firepower, the 6T never overheats. The surface temperature never exceeds 34°C. No need to burn your fingers while playing or shooting with the camera.

Enfin, not surprisingly, the camera is a real beast of a game, allowing you to spin all the titles in the Play Store with flawless fluidity and impeccable graphics.


For For the first time in its history, OnePlus is releasing a cell phone without a mini-jack socket. A controversial decision that the company justifies by explaining that with the fingerprint sensor under the screen and the amount of embedded technology, space was running out. Anyway, unlike Apple, OnePlus has the good taste to provide a USB-C to mini-jack adapter to pass the pill. And this one is proving to be pretty good. The signal is strong and almost undistorted. Unfortunately, if the dynamics are correct, the channel separation is slightly too messy.

Quant to the loudspeaker - in the singular, yes, since the one above the camera is strangely active only for calls -, it delivers a powerful sound and fully restores the sound spectrum, but there is a hint of distortion at full volume.


Sur the photo pane, OnePlus has kept the same configuration on the 6T as on the 6. The back side features a main module with optical stabilization. It is composed of a 16 Mpx sensor associated with a lens opening at f/1.7 and a second one of 20 Mpx only dedicated to the "portrait mode". But if the hardware has not changed, the software recipe has been improved. And it shows.

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In In daylight, the 6T is capable of capturing contrasting shots, rich in detail and stitching. The mobile has little to reproach itself with on this side, just like its predecessor actually. The color reproduction is faithful, and except for a slight loss of detail at the edges of the scene, nothing really disturbing is noticeable. Even the densest areas are teeming with detail (thanks to the 16 million pixels). Pixel beam 3 XL, the 6T smoothes its shots a little bit more, but nothing too bad.

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Labo - OnePlus low-light photo performance 6T

Fraîchement announced, the OnePlus 6T has already passed through our labs. This is an opportunity for us to take stock of its night-time photo capabilities before...

Là where the change in processing is most impressive is on night-time photos. We've already covered the camera's prowess at length in a dedicated article (link above), but to sum up, the 6T has made great progress compared to its predecessor, and that's good because night photography was precisely the Achilles' heel of the OnePlus 6. When the light runs out, the phone has a slightly heavier hand on the smoothing, but this is done without too much damage to the details that are still very present. You lose some stitching and contrast, but the scene remains clean and overall legible. Facing Pixel 3 in the same conditions, the 6T handles white balance and color reproduction less well.

front photo module, for its part, often has trouble getting enough light in and therefore raises the ISOs to compensate. As a logical result, we notice a small amount of grain on photos that are otherwise quite successful. The portrait mode, on the other hand, produces very successful results with a quality bokeh and a clean cropping that highlights the subject well.


OnePlus 6T's dual photo sensor.

Enfin, video capture, whether in Full HD or 4K Ultra HD, is seamless and there's no question about image quality.


Véritable Because of the 5T, but less than the 6, the autonomy has this time been the object of a particular care. Despite a relatively slender body, the device incorporates a 3,700 mAh battery that allows OnePlus to announce "two days of autonomy". And the company doesn't lie. In our Smartviser home battery test, the phone lasted 16 hours and 20 minutes. A very honorable score, just behind theNote 9 and at theMate 20 Pro level. In practice, this translates into two days of endurance in intensive use. So if you forget to charge the phone one night, it won't snap the next day.


By plus, the "Dash Charge" (the manufacturer's in-house quick charge protocol) can restore more than 50% of the battery in just half an hour, while a full charge will take just 1 hour. It's a great way to regain a few precious hours of battery life in a hurry. The only problem is that you will need to use the brick and charging cable supplied with the device to take advantage of it.