Xiaomi Mi Mix 3 review

Display

Xiaomi Mi Mix 3 is a great-looking smartphone - that's for sure. But the thing you'll spend the most time looking at is the 6.39" Super AMOLED screen. Notch-less. Bezel-less. Yes, it's all that - at least by the most current industry standards.

Anyway, the OLED screen has an expanded 1080p resolution - meaning 1,080 x 2,340 pixels or 403 ppi. The screen aspect ratio is 19.5:9 - among the widest, the mobile market has to offer today. While this is not the highest resolution we've encountered, at 403ppi the screen is as sharp as a flagship needs to be. And the pixels density is high enough for the PenTile matrix to be unnoticeable for the naked eye.

Xiaomi is promising 430 nits of typical and 600 nits of maximum brightness for the Mix 3 screen. And we can confirm those numbers - we measured 445 nits of brightness at the far right of the brightness scrubber and 2.1 nits at the far left. The screen can also achieve 633 nits on Auto mode when the ambient light is bright enough.

There is no light bleed - when the screen is showing black it's not lit at all.

In our sunlight legibility test, the Mi Mix 3 posted a respectable score for contrast, towards the top for its class.

Sunlight contrast ratio

• Apple iPhone XS
  5.171
• Apple iPhone X
  5.013
• Huawei Mate 20 Pro
  4.965
• OnePlus 5T
  4.789
• Samsung Galaxy S8
  4.768
• Asus ROG Phone
  4.765
• Samsung Galaxy S8+
  4.658
• Samsung Galaxy S9
  4.63
• Samsung Galaxy S6 edge+
  4.615
• Samsung Galaxy S9+
  4.537
• Samsung Galaxy Note9
  4.531
• Apple iPhone XS Max
  4.516
• Sony Xperia XZ3
  4.502
• Motorola Moto Z2 Play
  4.459
• Oppo R11
  4.454
• Samsung Galaxy S7 edge
  4.439
• Oppo RX17 Pro
  4.434
• OnePlus 3
  4.424
• Samsung Galaxy S7
  4.376
• Google Pixel 3
  4.35
• Samsung Galaxy A7 (2018)
  4.324
• OnePlus 6
  4.321
• Xiaomi Mi Mix 3
  4.291
• HTC One A9
  4.274
• LG V40 ThinQ
  4.256
• Oppo R15 Pro
  4.251
• Samsung Galaxy Note7
  4.247
• Samsung Galaxy A3
  4.241
• Nokia 8
  4.239
• Google Pixel 2 XL (pre-update)
  4.234
• OnePlus 3T
  4.232
• Samsung Galaxy A9 (2018)
  4.22
• Google Pixel XL
  4.164
• ZTE Axon 7
  4.154
• Samsung Galaxy Note8
  4.148
• Meizu Pro 7 Plus
  4.147
• OnePlus 6T
  4.138
• Samsung Galaxy S6 edge
  4.124
• Samsung Galaxy A7 (2017)
  4.124
• vivo V11
  4.113
• Huawei Mate 10 Pro (normal)
  4.096
• Samsung Galaxy Note5
  4.09
• Huawei P20 Pro
  4.087
• Xiaomi Mi 8
  4.086
• Meizu 15
  4.082
• Nokia 6 (2018)
  4.052
• Google Pixel 2 (pre-update)
  4.023
• LG V30
  4.022
• Huawei Nexus 6P
  4.019
• vivo NEX S
  4.012
• Honor Magic 2
  4.01
• Samsung Galaxy J7 Pro
  3.998
• OnePlus X
  3.983
• Vivo Xplay5 Elite
  3.983
• LG G7 ThinQ (outdoor)
  3.978
• Oppo R7s
  3.964
• Apple iPhone 7
  3.964
• Apple iPhone 8 (True Tone)
  3.957
• Huawei P9 Plus
  3.956
• Oppo Find X
  3.954
• Meizu Pro 6 Plus
  3.935
• Lenovo Moto Z
  3.931
• Samsung Galaxy A7 (2016)
  3.918
• OnePlus 5
  3.914
• Samsung Galaxy C5
  3.911
• Xiaomi Mi 8 SE
  3.901
• Samsung Galaxy C7
  3.896
• Samsung Galaxy A5
  3.895
• Samsung Galaxy J7 outdoor
  3.879
• Samsung Galaxy J2 outdoor
  3.873
• Motorola Moto G6 Plus
  3.865
• Samsung Galaxy A8
  3.859
• Samsung Galaxy A8 (2018)
  3.842
• Apple iPhone 6
  3.838
• Microsoft Lumia 950XL
  3.837
• Samsung Galaxy A6+ (2018)
  3.834
• Sony Xperia XZs
  3.818
• Samsung Galaxy A9 (2016)
  3.817
• Motorola Moto X (2014)
  3.816
• Samsung Galaxy J7 (2017)
  3.812
• Samsung Galaxy A5 (2017)
  3.804
• 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
• Xiaomi Mi 6
  3.767
• Sony Xperia XZ1
  3.765
• Samsung Galaxy J7 (2016)
  3.756
• Nokia 8 Sirocco
  3.745
• Sony Xperia XZ1 Compact
  3.729
• Apple iPhone 8 Plus (True Tone)
  3.725
• Oppo F1 Plus
  3.709
• Vivo X5Pro
  3.706
• Samsung Galaxy A3 (2017)
  3.688
• Huawei P20
  3.683
• Apple iPhone SE
  3.681
• Huawei Mate 9
  3.68
• Samsung Galaxy A7
  3.679
• Sony Xperia XZ2 Compact
  3.675
• Meizu PRO 6
  3.659
• BlackBerry Priv
  3.645
• Sony Xperia XA1 Ultra
  3.597
• Apple iPhone 7 Plus
  3.588
• Sony Xperia XZ2
  3.58
• LG G6
  3.556
• Apple iPhone 6s Plus
  3.53
• Motorola Moto Z Play
  3.526
• Samsung Galaxy J3 (2016)
  3.523
• Samsung Galaxy J3 (2016) outdoor mode
  3.523
• Acer Jade Primo
  3.521
• Microsoft Lumia 950
  3.512
• Oppo R7 Plus
  3.499
• Nokia 7 plus
  3.479
• nubia Z11
  3.466
• Huawei P10 Plus
  3.456
• HTC U Ultra
  3.453
• Motorola Moto G6
  3.448
• Sony Xperia XA2 Ultra
  3.445
• Sony Xperia XA2 Plus
  3.445
• Samsung Galaxy J7
  3.422
• Motorola Moto G6 Play
  3.419
• Meizu MX5
  3.416
• LG V20
  3.402
• Samsung Galaxy A6 (2018)
  3.397
• Xiaomi Redmi Note 5 AI Dual Camera
  3.393
• LG G7 ThinQ
  3.39
• Huawei P10
  3.379
• Samsung Galaxy J5 (2016)
  3.378
• Oppo R9s
  3.352
• Honor Play
  3.349
• Honor 8 Pro
  3.341
• Oppo F7
  3.333
• Oppo R7
  3.32
• Lenovo P2
  3.316
• Archos Diamond Omega
  3.305
• Honor 9
  3.289
• Xiaomi Mi 5s
  3.276
• Nokia 5
  3.261
• Nokia 6 (Chinese version)
  3.244
• Xiaomi Mi 5
  3.24
• Nokia 6 (Global version)
  3.238
• Samsung Galaxy J2
  3.235
• Oppo Realme 2 Pro
  3.235
• Sony Xperia X Performance
  3.234
• Xiaomi Mi Note 2
  3.228
• Motorola Moto X Play
  3.222
• Oppo F3 Plus
  3.218
• BlackBerry KEY2
  3.212
• Huawei Mate 9 Pro
  3.206
• Huawei P9
  3.195
• Xiaomi Mi Mix 2
  3.19
• ZTE Nubia Z17
  3.159
• Oppo R11s
  3.153
• Lenovo Vibe Shot
  3.113
• Honor 8X
  3.113
• HTC U11 Life
  3.108
• Motorola Moto X Force
  3.105
• LG Nexus 5X
  3.092
• HTC U11
  3.089
• Xiaomi Mi A2 Lite
  3.087
• HTC U12+
  3.085
• Xiaomi Redmi S2 (Y2)
  3.077
• Huawei Mate S
  3.073
• Oppo F9
  3.069
• Microsoft Lumia 640 XL
  3.065
• Xiaomi Mi Max 3
  3.061
• Xiaomi Pocophone F1
  3.059
• Huawei Mate 20
  3.052
• Huawei Mate 20 Lite
  3.051
• Motorola One (P30 Play)
  3.026
• Apple iPhone 6 Plus
  3.023
• Asus Zenfone 4 ZE554KL
  3.019
• Sony Xperia XA1
  3.012
• Motorola Moto X4
  3.012
• Oppo Realme 2
  3.006
• Sony Xperia L1
  2.994
• Sony Xperia X
  2.989
• LG Q6
  2.987
• Huawei P10 Lite
  2.974
• Samsung Galaxy Note
  2.97
• Xiaomi Redmi Note 6 Pro
  2.966
• Huawei P20 Lite
  2.952
• Xiaomi Redmi 5
  2.951
• Huawei Mate 8
  2.949
• Sony Xperia XA2
  2.938
• Oppo Realme 1
  2.932
• Razer Phone 2
  2.932
• Sony Xperia XZ2 Premium
  2.867
• Xiaomi Mi 8 Lite
  2.862
• Microsoft Lumia 550
  2.851
• Nokia 3.1
  2.837
• Realme U1
  2.815
• Lenovo Moto M
  2.813
• Nokia 7.1
  2.804
• Xiaomi Redmi 3 Pro
  2.803
• Sony Xperia Z5 compact
  2.784
• Honor 10 (Vivid)
  2.757
• Nokia 2
  2.752
• Meizu MX6
  2.751
• LG V10
  2.744
• Huawei Mate 10 (normal)
  2.742
• Motorola Moto G5S Plus
  2.737
• Xiaomi Redmi 3
  2.735
• Huawei Honor 7X
  2.734
• Xiaomi Redmi Note 4 (S625)
  2.714
• Meizu M5
  2.71
• Xiaomi Mi A2
  2.696
• Sony Xperia M5
  2.69
• Xiaomi Mi A1
  2.689
• Huawei P9 Lite
  2.679
• Xiaomi Redmi 4 Prime
  2.679
• vivo V7+
  2.671
• Vivo V3Max
  2.659
• Xiaomi Mi Mix
  2.658
• Huawei P Smart
  2.563
• Xiaomi Mi Max 2
  2.561
• HTC U11+
  2.556
• Xiaomi Redmi Note 5A (Y1)
  2.556
• Lenovo Moto G4
  2.544
• Lenovo K6 Note
  2.544
• Oppo F1
  2.528
• Sony Xperia Z5 Premium
  2.525
• Motorola Moto G
  2.477
• Lenovo Vibe K5 Plus
  2.473
• Huawei G8
  2.471
• Huawei nova
  2.467
• Sony Xperia Z
  2.462
• Huawei nova plus
  2.329
• Razer Phone
  2.328
• HTC One E9+
  2.305
• Alcatel One Touch Hero
  2.272
• Apple iPhone 4S
  2.269
• Sony Xperia L2
  2.266
• Lenovo Vibe K4 Note
  2.254
• Sony Xperia C5 Ultra
  2.253
• HTC U11+ (EU)
  2.253
• Xiaomi Redmi Note 3 (MediaTek)
  2.249
• OnePlus Two
  2.165
• HTC One X
  2.158
• LG Aka
  2.145
• Xiaomi Redmi Note 4 (X20)
  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
• vivo V5
  2.059
• Moto G 3rd gen max manual
  2.026
• Xiaomi Mi 3
  2.001
• Xiaomi Mi Max
  1.996
• Sony Xperia E4g
  1.972
• OnePlus One
  1.961

Color reproduction can be very accurate if that's your thing. Going for the 'Standard contrast' mode you'd be getting an average DeltaE of 2.3 (when compared against the sRGB color space) and the most accurate whites of all modes. Out of the box, the Mi Mix is in 'Automatic contrast' mode. That corresponds to DCI-P3 colors space and gives an average DeltaE of 4.5 - decent - but with an added blue tint in white and all shades of gray.

Battery life

The Xiaomi Mi Mix 3 is powered by a 3,200 mAh Li-ion battery. It's not the largest by any means, but that's not always as important. The Mix 3 supports Quick Charge 3.0 and 4.0+ and its supplied 18W charger fills 54% of a depleted battery in 30 mins.

The Mix 3 also comes bundled with a 10W wireless charger, which can replenish 0 to 32% in half an hour - really impressive! The charger is rather small and has a soft finish that is really nice on touch. The pad gets a bit warm during the first stages of charging, but it's nothing really worrying.

We ran our battery tests, and the Mi Mix 3 posted an overall score of 84 hours. That's a huge improvement over the Mi Mix 2 and 2S, and about as much as the Mi 8 got - all three of them running on the same Snapdragon 845 chip and powered by 3,400 mAh batteries.

The Mix 3 actually did great in our screen-on-tests - the web and video playback times are impressive for a screen of this caliber, while the 3G talk time is more than enough. The standby performance is about the average, though, and it's what stopped the final endurance rating from going north of the 100 hours mark.

Our battery tests were automated thanks to SmartViser, using its viSer App. The endurance rating above denotes how long a single battery charge will last you if you use the Xiaomi Mi Mix 3 for an hour each of telephony, web browsing, and video playback daily. We've established this usage pattern so that our battery results are comparable across devices in the most common day-to-day tasks. The battery testing procedure is described in detail in case you're interested in the nitty-gritty. You can 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.

Speaker test (old, new one below)

There's a single bottom-firing loudspeaker on the Mi Mix 3 - it's decently loud and scored a Good mark on our test. The output is excellent - there is rich sound and no distortion.

Speaker test (new)

Use the Playback controls to listen to the phone sample recordings (best use headphones). We measure the average loudness of the speakers in LUFS. A lower absolute value means a louder sound. A look at the frequency response chart will tell you how far off the ideal "0db" flat line is the reproduction of the bass, treble, and mid frequencies. You can add more phones to compare how they differ. The scores and ratings are not comparable with our older loudspeaker test. Learn more about how we test here.

Audio quality

Xiaomi Mi Mix 3 did excellently when plugged into an active external amplifier, delivering perfectly accurate audio reproduction and volume levels well above average.

Headphones didn’t cause too much damage - volume dropped a tiny bit but remained in the upper half of tested phones, while the hike in stereo crosstalk was also lower than average. There’s a tiny bit of intermodulation distortion here too, but nothing to worry about. A solid if not necessarily chart-topping performance.

Xiaomi Mi Mix 3 frequency response

You can learn more about the tested parameters and the whole testing process here.