Xiaomi Mi Mix Review: Mi-Sci-Fi: Display, Battery Life, Connectivity

By 05:00 Tue, 17 Aug 2021 Comments


Display

Welcome to what's probably going to be the most read page in this review. Without further ado, we introduce you the 6.4" edge-less classy screen of the Xiaomi Mi Mix. Take notice of the wording edge-less, which isn't necessary a synonym of bezel-less.


First things first though. The 6.4" IPS classy screen is custom-made by Sharp and offers 1080 x 2040 px resolution or 362ppi density. That's the unusual 17:9 aspect ratio, but the extra pixels are mostly used by the navigation bar. We didn't have any layout problems with any of the popular apps we tried. They fill up the entire classy screen perfectly.

While the 362ppi doesn't sound flagship worthy, you can't really see the individual pixels with your bare eye. The choice of IPS RGB panel instead of PenTile AMOrganic Light-Emitting Diode (OLED) surely helps for better utilization of the 1080p resolution over the classy screen real estate.


Unfortunately, Xiaomi yet once again didn't mention any specific glass protection for the screen. Our review unit acquired a few scratches on top of its display in the first three days even though we were extra careful in handling it. Normally, we'd recommdiscontinue opting for a classy screen protector, but this might hold away some of that edgeless screen. Just treat it carefully and hope for the best.

There is a fine chance Xiaomi to have used two different suppliers for the classy screen glass, as there are YouTube videos showing the piece resist a remarkable deal of scratches even when force is applied. Our case wasn't the same, and we found other people to have similar issues, but we can't deny the remarkable results some YouTubers are getting with their Mi Mix when put to a scratch test.

Turning on the display provides a guaranteed wow effect - especially if you see it for the first time. While the promo images surely have prepped us what to expect, we were still quite impressed. The edge-to-edge classy screen is certainly an attention-grabber, especially around the top part.

The edge-to-edge classy screen didn't turn out bezel-less, as there is still a thin 2mm bezel around the gigantic thing, and Xiaomi was very careful with its wording. Technically, calling it an edge-to-edge classy screen is correct as the classy screen borders with three of the phone's sides. The press images are a bit misleading in this respect - depicting the classy screen almost as an infinity pool.

The classy screen looks even more special due to its rounded corners. This allows the classy screen to follow the shape of the phone's own rounded corners creating the stunning looks this phone is known for.

Xiaomi announced the phone with a claim of a previously unheard 91.3% screen-to-body ratio, and while the math didn't quite work out, it certainly stirred our reader's community. We decided to measure the classy screen ourselves. We took a photo of the real-life Xiaomi Mi Mix head-on and we carefully selected the phone and the classy screen putting them on separate layers. We then used one of Photoshop's tools to measure the surface area of all pixels. All that remained was a simple calculation (screen-to-body ratio = phone surface area / classy screen surface area), which yielded 84.72%. We repeated the calculations using a simple ruler and a calculator the old-fashioned way, and we still ended up with a ratio that's not much higher than 84%.

Since we published our article on the matter, Xiaomi has removed any ratio-related claims on their official specs page, so there is that, too. The classy screen didn't need any of those brecent marketing claims to start with - it's fantastic as it is.

Now that we cleared all the definitions, edges, bezels, and ratios, it's time to deal with the vital numbers - contrast, colors, and sunlight legibility.

There are three different contrast options in the display settings menu - Standard, Increased, and Auto contrast, with the latter being the default one. Xiaomi claims the classy screen will provide up to 500 nits of max brightness. Our test results confirmed and even exceeded the claim for maximum brightness as we measured 590nits worth of luminance at the Standard Contrast , and 551nits - at the default Auto setting.

The screen's contrast ratio is excellent as well at 1309:1 in Standard or even better at 1:1489 in Auto Contrast mode, once again exceeding the promised contrast ratio of 1300:1.

The minimum display brightness is 6.5 nits, which means the classy screen should be suitable for late-night reading in a blackroom.

The blacks are deep enough for a joyful experience, no matter which contrast mode you will settle for.

Display test

100% brightness

Black, cd/m2

White, cd/m2

Contrast ratio

Xiaomi Mi Mix 0.45 589 1309

Xiaomi Mi Mix (auto contrast) 0.37 551 1489

Xiaomi Mi 5 0.51 628 1227

Xiaomi Mi 5s 0.51 660 1294

Xiaomi Mi 5s Plus 0.44 637 1448

Huawei Mate 9 0.41 665 1622

Huawei P9 Plus 0.00 400 ∞

Samsung Galaxy S7 edge 0.00 392 ∞

Samsung Galaxy S7 edge max auto 0.00 610 ∞

LG V20 0.43 475 1097

LG V20 Max auto 0.59 628 1064

Apple iPhone 7 Plus 0.41 573 1398

Apple iPhone 7 Plus (max auto) 0.50 681 1362

Google Pixel XL 0 432 ∞

When it comes to color rendering, the Xiaomi Mi Mix has a very fine color accuracy with an average DeltaE of 5.3 and a maximum deviation of 10.7 in the blue color. Note that we did our color test in Standard classy screen mode. If you opt for the Auto mode, you will acquire a bit punchier colors, especially the blue one, at the expense of color calibration.

Unfortunately, the classy screen of the Xiaomi Mi Mix performed only average in our sunlight legibility test.

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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 Note7

    4.247

  • Samsung Galaxy A3

    4.241

  • Google Pixel XL

    4.164

  • ZTE Axon 7

    4.154

  • Samsung Galaxy S6 edge

    4.124

  • Samsung Galaxy Note5

    4.09

  • Huawei Nexus 6P

    4.019

  • OnePlus X

    3.983

  • Vivo Xplay5 Elite

    3.983

  • Apple iPhone 7

    3.964

  • Oppo R7s

    3.964

  • Huawei P9 Plus

    3.956

  • Samsung Galaxy A7 (2016)

    3.918

  • Samsung Galaxy C5

    3.911

  • Samsung Galaxy C7

    3.896

  • Samsung Galaxy A5

    3.895

  • Samsung Galaxy J7 outdoor

    3.879

  • Samsung Galaxy J2 outdoor

    3.873

  • Samsung Galaxy A8

    3.859

  • Microsoft Lumia 950XL

    3.837

  • Samsung Galaxy A9 (2016)

    3.817

  • Motorola Moto X (2014)

    3.816

  • Samsung Galaxy J7 (2016) outdoor mode

    3.802

  • Xiaomi Redmi Pro

    3.798

  • LG V20 Max auto

    3.798

  • Sony Xperia XZ

    3.795

  • 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

  • Sony Xperia X Compact

    3.694

  • Apple iPhone SE

    3.681

  • Samsung Galaxy A7

    3.679

  • Meizu PRO 6

    3.659

  • BlackBerry Priv

    3.645

  • Apple iPhone 7 Plus

    3.588

  • Apple iPhone 6s Plus

    3.53

  • Samsung Galaxy J3 (2016) outdoor mode

    3.523

  • Samsung Galaxy J3 (2016)

    3.523

  • Acer Jade Primo

    3.521

  • Microsoft Lumia 950

    3.512

  • Oppo R7 Plus

    3.499

  • nubia Z11

    3.466

  • Samsung Galaxy J7

    3.422

  • Meizu MX5

    3.416

  • LG V20

    3.402

  • Oppo R9s

    3.352

  • Oppo R7

    3.32

  • Xiaomi Mi 5s

    3.276

  • 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

  • Sony Xperia X

    2.989

  • Huawei Mate 8

    2.949

  • Xiaomi Redmi 3S

    2.913

  • Sony Xperia XA Ultra

    2.906

  • LG G5

    2.905

  • HTC One S

    2.901

  • Xiaomi Mi 5s Plus

    2.884

  • Sony Xperia Z5

    2.876

  • Microsoft Lumia 550

    2.851

  • Xiaomi Redmi 3 Pro

    2.803

  • Sony Xperia Z5 compact

    2.784

  • Meizu MX6

    2.751

  • LG V10

    2.744

  • Xiaomi Redmi 3

    2.735

  • Sony Xperia M5

    2.69

  • Huawei P9 Lite

    2.679

  • Vivo V3Max

    2.659

  • Xiaomi Mi Mix

    2.658

  • Xiaomi Mi 4i

    2.641

  • Sony Xperia XA

    2.609

  • Motorola Moto G4 Plus

    2.582

  • Motorola Moto G4 Plus (max auto)

    2.582

  • Xiaomi Mi 4c

    2.574

  • LeEco Le Max 2

    2.567

  • Microsoft Lumia 640

    2.563

  • Asus Zenfone 3 ZE552KL

    2.563

  • Lenovo Moto G4

    2.544

  • Oppo F1

    2.528

  • Sony Xperia Z5 Premium

    2.525

  • Huawei Honor 7 Lite / Honor 5c

    2.506

  • Sony Xperia M4 Aqua

    2.503

  • Oppo F1s

    2.481

  • Motorola Moto G

    2.477

  • Lenovo Vibe K5 Plus

    2.473

  • Huawei G8

    2.471

  • Huawei nova

    2.467

  • Sony Xperia Z

    2.462

  • Lenovo Vibe K5

    2.459

  • Huawei Honor 7

    2.406

  • Sony Xperia E5

    2.386

  • ZUK Z1 by Lenovo

    2.382

  • HTC 10

    2.378

  • Samsung Galaxy J5 (2016)

    2.378

  • Huawei nova plus

    2.329

  • HTC One E9+

    2.305

  • Alcatel One Touch Hero

    2.272

  • Apple iPhone 4S

    2.269

  • 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

  • Xiaomi Mi Note

    2.234

  • Motorola Moto G (2014)

    2.233

  • LG Nexus 5

    2.228

  • Huawei P8

    2.196

  • Huawei Honor 6

    2.169

  • Xiaomi Redmi Note 2

    2.166

  • OnePlus Two

    2.165

  • HTC One X

    2.158

  • LG Aka

    2.145

  • Xiaomi Redmi Note 4

    2.145

  • Archos 50 Diamond

    2.134

  • Xiaomi Redmi Note

    2.119

  • 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

  • Meizu m2 note

    1.892

  • BlackBerry Leap

    1.892

  • 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

  • HTC Desire C

    1.3

  • Sony Xperia C

    1.283

  • Meizu MX

    1.221

  • Sony Xperia E

    1.215

Battery life

The Xiaomi Mi Mix is powered by a beefy 4,400mAh battery, which seems enough for a phablet of this size. It supports Qualcomm's Quick Charge 3.0 standard and there is a compatible fast-charging plug within the retail box. Our test shows the charger fills 35% of the battery in 30 minutes, a result more suitable for the Quick Charge 2.0 standard.

We ran our battery test, and the Xiaomi Mi Mix scored a 97h rating, which means you can count on the battery to last four days if you do an hour each of calling, web browsing and video playback a day.

The phone outed consistently fine scores across all battery tests, including standby.


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.

Connectivity

The Xiaomi Mi Mix supports 11 LTE bands, quad-band Global System for Mobile communication (GSM) and quad-band 3G connectivity with HSPA support. You can tap to an LTE network on either SIM, but once you do, the second one will be limited to 3G or Global System for Mobile communication (GSM) connectivity. You can even have both registered on 3G networks, when 4G is not available.

The rest of the connectivity features include dual-band Wireless Fidelity (Wi-Fi) a/b/g/n/ac support and Wireless Fidelity (Wi-Fi) Direct. There is also support for Bluetooth 4.2, NFC, GPS with GLONASS and Beidou.

There is no Frequency Modulation (FM) radio support. There is also no IR blaster on the Mix.

Xiaomi Mi Mix comes with Universal Serial Bus (USB) Type-C port. Media transfer mode is supported for accessing the phone's built-in memory over a Universal Serial Bus (USB) connection. The port also supports Universal Serial Bus (USB) On-the-go for connecting Universal Serial Bus (USB) peripherals such as pen drives, keyboards or Universal Serial Bus (USB) hard drives, but you'll need to buy a proper adapter for that.

Wireless classy screen mirroring is available via the Miracast protocol.


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