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.
Display test
100% brightness
Black, cd/m2
White, cd/m2
Contrast ratio
Xiaomi Mi Mix 3
0
445
∞
Xiaomi Mi Mix 3 (Max Auto)
0
633
∞
Xiaomi Mi Mix 2S
0.375
453
1208
Xiaomi MI Mix 2S (Increased Contrast)
0.409
519
1269
Xiaomi Mi Mix
0.45
589
1309
Xiaomi Mi Mix (auto contrast)
0.37
551
1489
Honor Magic 2
0
433
∞
Samsung Galaxy Note9
0
367
∞
Samsung Galaxy Note9 (Max Auto)
0
658
∞
Samsung Galaxy S9+
0
376
∞
Samsung Galaxy S9+ (Max Auto)
0
631
∞
Apple iPhone XS Max
0
653
∞
Oppo Find X
0
426
∞
OnePlus 6T
0
453
∞
OnePlus 6T (Max Auto)
0
455
∞
Oppo RX17 Pro
0
455
∞
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.
Speakerphone test
Voice, dB
Pink noise/ Music, dB
Ringing phone, dB
Overall score
Xiaomi Mi Mix 3
67.9
71.6
73.7
Good
Xiaomi Mi Mix 2S
68.1
70.1
81.5
Very Good
Xiaomi Mi Mix 2
67.6
71.0
82.7
Very Good
Samsung Galaxy S9+
68.4
74.0
80.1
Very Good
Xiaomi Mi 8
68.1
72.3
82.2
Very Good
Xiaomi Mi Mix
64.2
72.8
86.0
Very Good
Oppo Find X
70.7
75.2
81.2
Very Good
Apple iPhone XS Max
70.5
74.0
84.7
Excellent
Xiaomi Mi 8 SE
70.5
74.1
85.2
Excellent
Honor Magic 2
72.5
73.6
85.2
Excellent
vivo NEX S
71.3
74.5
91.0
Excellent
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.
Test
Frequency
response
Noise
level
Dynamic
range
THD
IMD
+ Noise
Stereo
crosstalk
Xiaomi Mi Mix 3
+0.02,
-0.02
-93.2
93.2
0.0014
0.072
-90.6
Xiaomi Mi Mix 3
(headphones)
+0.09,
-0.07
-92.7
92.6
0.0033
0.151
-60.9
Huawei Mate 20
+0.02,
-0.16
-92.1
92.0
0.0017
0.013
-85.6
Huawei Mate 20
(headphones)
+0.07,
-0.07
-92.1
92.4
0.0021
0.106
-66.5
OnePlus
6T
+0.03,
-0.05
-93.4
93.3
0.0010
0.0070
-93.8
OnePlus 6T
(headphones)
+0.17,
-0.15
-93.2
93.1
0.0056
0.245
-61.1
Sony Xperia
XZ3
+0.01,
-0.02
-91.2
93.2
0.0024
0.0080
-88.7
Sony Xperia XZ3
(headphones)
+0.38,
-0.21
-93.1
92.5
0.0049
0.233
-61.7
Samsung Galaxy
Note9
+0.01,
-0.03
-93.7
93.7
0.0017
0.0074
-94.1
Samsung Galaxy Note9
(headphones)
+0.03,
-0.02
-93.6
93.5
0.0033
0.046
-93.2
Xiaomi Mi Mix 3 frequency response
You can learn more about the tested parameters and the whole testing
process here.
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