The 5.5" IPS display of the Mi 5X is very common among the Xiaomi smartphones, especially at the Redmi Note series. So, there are no surprises with the screen unit chosen for the Mi 5X - it has a 5.5" matrix with RGB arrangement and 1080p resolution.
Xiaomi promises 450 nits of maximum brightness for the Mi 5X's screen and a contrast ratio of 1000:1. We did our display test and it revealed a maximum brightness of 470 nits and one of the deepest blacks we've seen on an LCD screen. Thanks to those impressive black levels and above average brightness we got a top-notch contrast ratio of 1738:1. The color reproduction turned out about average, with an average DeltaE of 7.4 and somewhat punchy colors (especially the blue hues).
We then dug into the settings and change the screen's contrast from Auto (the default option) to Standard. The maximum brightness went as up as 550 nits while the deep black levels didn't take a hit and thus the screen kept its excellent contrast. The color rendering changed significantly - we got an average DeltaE of 3.7 where all colors were toned down to very accurate levels.
Display test
100% brightness
Black, cd/m2
White, cd/m2
Contrast ratio
Xiaomi Mi 5X (Auto)
0.271
471
1738
Xiaomi Mi 5X (Standard)
0.343
549
1601
Xiaomi Mi 6
0.462
603
1305
Huawei P10 Lite
0.351
560
1595
Sony Xperia XA1
0.512
537
1049
Nokia 5
0.69
632
916
Nokia 6 (Global version)
0.364
484
1330
Xiaomi Redmi Note 4 (S625)
0.322
484
1503
Xiaomi Redmi Note 4 (X20)
0.38
439
1158
Samsung Galaxy J7 (2017) Max Auto
0
482
∞
Meizu M5 Note
0.614
463
754
OnePlus 3T
0
447
∞
Meizu M5s
0.426
407
955
Samsung Galaxy J7 (2017)
0
348
∞
The sunlight legibility is okay on the Mi 5X - it suffers from washed-out colors in the sun, but other than that you will be able to see what's happening on the screen quite well.
Sunlight contrast ratio
Samsung Galaxy S8 4.768
Samsung Galaxy S8+ 4.658
Samsung Galaxy S6 edge+ 4.615
Oppo R11 4.454
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
Nokia 8 4.239
OnePlus 3T 4.232
Google Pixel XL 4.164
ZTE Axon 7 4.154
Samsung Galaxy Note8 4.148
Meizu Pro 7 Plus 4.147
Samsung Galaxy S6 edge 4.124
Samsung Galaxy A7 (2017) 4.124
Samsung Galaxy Note5 4.09
LG V30 4.022
Huawei Nexus 6P 4.019
Vivo Xplay5 Elite 3.983
OnePlus X 3.983
Apple iPhone 7 3.964
Oppo R7s 3.964
Huawei P9 Plus 3.956
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
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
Apple iPhone 6 3.838
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
Oppo F1 Plus 3.709
Vivo X5Pro 3.706
Sony Xperia X Compact 3.694
Samsung Galaxy A3 (2017) 3.688
Apple iPhone SE 3.681
Huawei Mate 9 3.68
Samsung Galaxy A7 3.679
Meizu PRO 6 3.659
BlackBerry Priv 3.645
Sony Xperia XA1 Ultra 3.597
Apple iPhone 7 Plus 3.588
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
nubia Z11 3.466
Huawei P10 Plus 3.456
HTC U Ultra 3.453
Samsung Galaxy J7 3.422
Meizu MX5 3.416
LG V20 3.402
Huawei P10 3.379
Samsung Galaxy J5 (2016) 3.378
Oppo R9s 3.352
Honor 8 Pro 3.341
Oppo R7 3.32
Lenovo P2 3.316
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
Sony Xperia X Performance 3.234
Xiaomi Mi Note 2 3.228
Motorola Moto X Play 3.222
Oppo F3 Plus 3.218
Huawei Mate 9 Pro 3.206
Huawei P9 3.195
ZTE Nubia Z17 3.159
Lenovo Vibe Shot 3.113
Motorola Moto X Force 3.105
LG Nexus 5X 3.092
HTC U11 3.089
Huawei Mate S 3.073
Microsoft Lumia 640 XL 3.065
Sony Xperia XA1 3.012
Sony Xperia L1 2.994
Sony Xperia X 2.989
Huawei P10 Lite 2.974
Samsung Galaxy Note 2.97
Sony Xperia Z1 2.95
Huawei Mate 8 2.949
Xiaomi Redmi 4 2.92
Xiaomi Redmi 3S 2.913
Sony Xperia XA Ultra 2.906
LG G5 2.905
HTC One S 2.901
Xiaomi Redmi 3s Prime 2.893
Xiaomi Mi 5s Plus 2.884
Sony Xperia XZ Premium 2.877
Sony Xperia XZ Premium (sRGB) 2.877
Sony Xperia Z5 2.876
Nokia 3 2.871
Microsoft Lumia 550 2.851
Lenovo Moto M 2.813
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
Xiaomi Redmi Note 4 (S625) 2.714
Meizu M5 2.71
Sony Xperia M5 2.69
Huawei P9 Lite 2.679
Xiaomi Redmi 4 Prime 2.679
Vivo V3Max 2.659
Xiaomi Mi Mix 2.658
Doogee Mix 2.642
Xiaomi Mi 4i 2.641
Xiaomi Redmi 4a 2.635
Xiaomi Mi 5X (Standard) 2.616
Sony Xperia XA 2.609
Motorola Moto G4 Plus (max auto) 2.582
Motorola Moto G4 Plus 2.582
Meizu M5s 2.58
Xiaomi Mi 4c 2.574
LeEco Le Max 2 2.567
Asus Zenfone 3 ZE552KL 2.563
Microsoft Lumia 640 2.563
Xiaomi Mi Max 2 2.561
Lenovo Moto G4 2.544
Lenovo K6 Note 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
Meizu m3 max 2.447
Xiaomi Mi 5X (Auto) 2.417
HTC 10 evo 2.407
Huawei Honor 7 2.406
Sony Xperia E5 2.386
ZUK Z1 by Lenovo 2.382
HTC 10 2.378
Oppo F3 2.376
vivo V5 Plus 2.371
Meizu m1 note 2.362
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
Meizu M5 Note 2.189
Huawei Honor 6 2.169
Xiaomi Redmi Note 2 2.166
OnePlus Two 2.165
HTC One X 2.158
Xiaomi Redmi Note 4 (X20) 2.145
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
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
Meizu m3 note 1.923
Meizu m2 note 1.892
BlackBerry Leap 1.892
HTC Butterfly 1.873
Sony Xperia Z1 Compact 1.772
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
Sony Xperia L 1.351
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 5X has a 3,080mAh battery, not as impressive as the 4,000 mAh unit inside the Redmi Note 4, but the energy efficient Snapdragon 625 should help it achieve some good battery endurance. The Mi 5X supports regular 5V/2A charging, which restores 25% of the battery in 30 minutes of charging.
Indeed, the Snapdragon 625 chip once again lived up to our expectations. The Xiaomi Mi 5X scored an excellent 80h endurance rating. It did a fabulous job in all tested scenarios - video, calls, web browsing and demonstrated above average performance on standby.
Our endurance rating denotes how long a single battery charge will last you if you use the Xiaomi Mi 5X for an hour each of telephony, web browsing, and video playback daily. We've established this usage pattern so 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-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 5X is a dual-SIM phone with LTE connectivity. The slot is a hybrid solution and allows you to replace the one of the nanoSIMs with a microSD card.
There's also Wi-Fi ac, Bluetooth 4.2 is also available. For positioning, you get GPS, GLONASS and, quite naturally, Beidou.
The IR blaster is located at the top of the phone, and coupled with the right software, you can use it to remotely control pretty much any IR-enabled home appliance. Xiaomi provides its own MiRemote app, which supports a long list of devices right out of the box.
The USB Type-C supports USB On-The-Go with the proper adapter in case you need to access some external storage or use a USB accessory.
Finally, there is FM radio with FM recording available on the Mi 5X.
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