Display

The OnePlus 3 is equipped with a 5.5-inch screen, which still seems to be right in the sweet spot by current standards. The 1080p resolution has been among the most controversial aspects of said display and frankly the whole phone. This is actually a debate that we have had before on quite a few occasions, so we won't go into the whole QHD vs FullHD debate yet again. What we'll say, however, is that having a more power-friendly lower-res panel was definitely a conscious decision and like Carl Pei has said on several occasions, not one dictated by cost. Sure, the diamond pentile pixel arrangement probably wasn't the best choice, but you really have to be nitpicking to go so far as to criticize it.

The AMOLED panel in question comes courtesy of Samsung and is specifically made for the OnePlus 3, hence the Optic AMOLED moniker. Still, it looks just as gorgeous as any other Samsung Super AMOLED panel and unless you place it next to a QHD phone, the difference between the two is hardly noticeable.

Just to try and address the whole resolution issue in its entirety as best we can, yes, 1080p is a notable drawback when it comes to VR and that is truly ironic, considering the recent release of the OnePlus VR headset. However, the company has made it clear that from its standpoint, strapping a phone to your forehead is more of a gimmick than a viable approach to VR in its current form, and as such is not considered a priority.

Anyway, back to the Optic AMOLED panel. It offers a quite respectable 401ppi and at 433 nits at full blast, it is bright enough for most scenarios. As expected, blacks are deep and contrast is infinite.

Display test 100% brightness Black, cd/m2 White, cd/m2 Contrast ratio OnePlus One 0.75 598 799 OnePlus Two 0.30 399 1334 OnePlus X 0.00 340 ∞ OnePlus 3 0.00 433 ∞ Xiaomi Redmi Note 3 (MediaTek) 0.42 403 953 Samsung Galaxy J5 (2016) 0.00 338 ∞ Samsung Galaxy J7 (2016) 0.00 353 ∞ Samsung Galaxy S7 0.00 391 ∞ Lenovo Vibe K4 Note 0.47 442 940 Oppo F1 Plus 0.00 351 ∞ ZUK Z1 by Lenovo 0.39 396 1021 Xiaomi Mi 4c 0.28 452 1609 Xiaomi Mi 5 0.51 628 1227 LG G4 0.43 532 1238 Sony Xperia Z3+ 0.68 789 1158 LeEco Le Max 2 0.30 426 1444 Samsung Galaxy S6 0.00 363 ∞ Samsung Galaxy A5 (2016) 0.00 421 ∞ Samsung Galaxy A7 (2016) 0.00 425 ∞

Sunlight legibility is superb. The panel on the OnePlus 3 surpasses most of Samsung's 2015 offers and is up to par with its current models.

Sunlight contrast ratio

Samsung Galaxy S6 edge+

4.615

Samsung Galaxy S7 edge

4.439

OnePlus 3

4.424

Samsung Galaxy S7

4.376

HTC One A9

4.274

Samsung Galaxy A3

4.241

Samsung Galaxy S6

4.124

Samsung Galaxy S6 edge

4.124

Samsung Galaxy Note5

4.09

Huawei Nexus 6P

4.019

OnePlus X

3.983

Oppo R7s

3.964

Samsung Galaxy A7 (2016)

3.918

Samsung Galaxy A5

3.895

Samsung Galaxy J7 outdoor

3.879

Samsung Galaxy J2 outdoor

3.873

Samsung Galaxy A8

3.859

Apple iPhone 6

3.838

Samsung Galaxy A9 (2016)

3.817

Motorola Moto X (2014)

3.816

Samsung Galaxy J7 (2016) outdoor mode

3.802

Samsung Galaxy A5 (2016)

3.789

Apple iPhone 6s

3.783

Meizu Pro 5

3.781

Microsoft Lumia 650

3.772

Samsung Galaxy J7 (2016)

3.756

Oppo F1 Plus

3.709

Vivo X5Pro

3.706

Apple iPhone SE

3.681

Samsung Galaxy A7

3.679

Meizu PRO 6

3.659

BlackBerry Priv

3.645

Apple iPhone 6s Plus

3.53

Acer Jade Primo

3.521

Microsoft Lumia 950

3.512

Oppo R7 Plus

3.499

Samsung Galaxy J7

3.422

Meizu MX5

3.416

Oppo R7

3.32

Xiaomi Mi 5

3.24

Samsung Galaxy J2

3.235

Sony Xperia X Performance

3.234

Motorola Moto X Play

3.222

Huawei P9

3.195

Lenovo Vibe Shot

3.113

Motorola Moto X Force

3.105

LG Nexus 5X

3.092

Huawei Mate S

3.073

Microsoft Lumia 640 XL

3.065

Apple iPhone 6 Plus

3.023

Sony Xperia X

2.989

Samsung Galaxy Note

2.97

Huawei Mate 8

2.949

LG G5

2.905

HTC One S

2.901

Sony Xperia Z5

2.876

Microsoft Lumia 550

2.851

Sony Xperia Z3+

2.824

Sony Xperia Z5 compact

2.784

LG V10

2.744

Xiaomi Redmi 3

2.735

Sony Xperia M5

2.69

Vivo V3Max

2.659

Xiaomi Mi 4i

2.641

Sony Xperia XA

2.609

Xiaomi Mi 4c

2.574

LeEco Le Max 2

2.567

Microsoft Lumia 640

2.563

Oppo F1

2.528

Sony Xperia Z5 Premium

2.525

Sony Xperia M4 Aqua

2.503

Motorola Moto G

2.477

Lenovo Vibe K5 Plus

2.473

Huawei G8

2.471

Sony Xperia Z

2.462

Huawei Honor 7

2.406

ZUK Z1 by Lenovo

2.382

HTC 10

2.378

Samsung Galaxy J5 (2016)

2.378

LG G4

2.317

HTC One E9+

2.305

Alcatel One Touch Hero

2.272

Lenovo Vibe K4 Note

2.254

Sony Xperia C5 Ultra

2.253

Xiaomi Redmi Note 3 (MediaTek)

2.249

Sony Xperia C4 Dual

2.235

Motorola Moto G (2014)

2.233

LG Nexus 5

2.228

Huawei P8

2.196

Xiaomi Redmi Note 2

2.166

OnePlus Two

2.165

HTC One X

2.158

LG Aka

2.145

Archos 50 Diamond

2.134

Xiaomi Redmi Note

2.119

Xiaomi Mi 4S

2.095

Acer Liquid X2

2.084

Huawei P8lite

2.078

Moto G 3rd gen max manual

2.026

Xiaomi Mi Max

1.996

Sony Xperia E4g

1.972

OnePlus One

1.961

Meizu m3 note

1.923

BlackBerry Leap

1.892

Meizu m2 note

1.892

HTC Butterfly

1.873

ZTE Nubia Z9 mini

1.759

Sony Xperia U

1.758

Asus Zenfone Selfie

1.68

Motorola Moto E (2nd Gen)

1.675

ZTE Nubia Z9

1.659

Jolla Jolla

1.605

Motorola Moto E

1.545

Sony Xperia M

1.473

Xiaomi Redmi 2

1.311

Sony Xperia C

1.283

Meizu MX

1.221

Sony Xperia E

1.215

As for colors and accuracy, there are quite a few points to be made. Just like with resolution, the OnePlus 3 has already received quite a bit of criticism for not offering tuning to sRGB. This is yet another point Carl Pei had to weigh in on, by saying that sRGB is another thing OnePlus consciously decided not to gun for, due to its limited appeal to a broader user base. The company co-founder has also promised that the feature will be added as an option within the setting in a future OTA, but overall, the OnePlus 3 exhibits the same rich colors as we have grown used to seeing on AMOLED screens.

There is also a color tone slider present in the phone's display settings. It actually changes the screen's behavior quite a bit. In its default setting, the display is actually a bit dimmer with a maximum brightness of 404 nits and all the colors are a lot punchier. If, however, you are after a more color-accurate setting, pulling the slider all the way to the right produces the best results with an average deltaE of 6.0. This also brings the brightness up to the aforementioned 433 nits.

Update:

Now that Oxygen OS 3.2 is officially out, OnePlus has made good on its promise to bring an sRGB calibration mode to the OnePlus 3. The results are definitely not perfect, but are pretty close to what is achievable through software alone, without actually tuning on a per-panel basis. On our testing unit, toggling sRGB mode brought the average deltaE down to only 2.9. Even more impressively, the maximum deltaE is just 4.9, instead of 13.2. Another point worth making is that under sRGB mode, colors become a lot less vivid than usual, quite similar to the Basic AMOLED mode on most Samsung panels.

Connectivity

The OnePlus 3 is a Dual-SIM device, just like its predecessor. It takes two nano SIM cards, neither of which is a hybrid slot. As mentioned, a microSD is not an option.

There is LTE on board as well. It comes courtesy of Qualcomm's current flagship chip, the Snapdragon 820, which means Cat.6 speeds of up to 300 Mbps downstream and a rich combination of HSPDA and LTE bands, making the OnePlus 3 a truly global device. Currently Wi-Fi Calling and VoLTE support are unconfirmed.

There's a full set of a/b/g/n/ac Wi-Fi standards on both the 2.4GHz and 5GHz bands, Wi-Fi Direct, hotspot and DLNA media sharing on supported TVs and PCs.

There is also Bluetooth 4.2 added to the mix, which is a small upgrade from the v4.1 in the OnePlus 2. Actually, the OnePlus 3 shares most of its communication capabilities with its predecessor with just minor upgrades like this.

Likewise, it also uses a USB Type-C port for charging, data and also USB host scenarios. Overall, USB Type-C is a safer choice now than it was last year, when the standard was still a rarity among devices. However, one thing that does already feel out of date is the USB 2.0 speed of the port. Still, it is not a massive drawback in most cases.

Battery

The OnePlus 3 is equipped with a sealed-in 3,000mAh battery. This is a fair amount of juice, but again, there could have been a little extra to go around, if OnePlus had stuck to their original flat back design approach. However, then we wouldn't have a device that is quite so thin and light.

The OnePlus 3 managed to clock in a respectable 66 hours of endurance rating. This actually falls in line pretty well with what we have seen from previous OnePlus phones - 61 hours total on the OnePlus 2 and exactly 66 hours on the original OnePlus One as well. This is an achievement, as the OnePlus 3 does have the smallest battery of the bunch.

It is great to see that the traditionally excellent call time has now become even better at almost 32 hours. Video playback has also received a major improvement. The weakest link seems to be browsing time.

As for charging, we already mentioned the excellent Dash charging technology that has become available via related Oppo and its industry-leading VOOC. OnePlus was also kind enough to include the necessary Dash adapter in the retail package. It is surprisingly compact and can pump out a whopping 4A / 5V, which adds up to 20W.

The technology also rules out drawbacks like overheating, which one could naturally expect at such a massive output. In fact, the Dash system is so efficient that it practically eliminated the need for overnight charging while we tested the device. 30 minutes on the socket consistently got us up to 60% from a dead phone.

The battery testing procedure is described in detail in case you're interested in the nitty-gritties. You can also check out our complete battery test table, where you can see how all of the smartphones we've tested will compare under your own typical use.