The Xiaomi Mi 4i features a similar 5" Full HD IPS display to the one we saw on the Mi 4. It has 441ppi for pleasantly sharp imagery. Unfortunately, the glass covering the display isn't scratch-resistant.
The 5" IPS display Xiaomi Mi 4i
Taking a closer look at it under our digital microscope reveals a standard RGB arrangement of the sub-pixels that make up the Xiaomi Mi 4i LCD panel.
The display on the Xiaomi Mi 4i has a lower maximum brightness level compared to the one on Xiaomi Mi 3, while retaining the same good contrast and colors.
Xiaomi is providing options for color temperature and saturation, so you can tweak the display to your liking.
Display test
50% brightness
100% brightness
Black, cd/m2
White, cd/m2
Contrast ratio
Black, cd/m2
White, cd/m2
Contrast ratio
Xiaomi Mi 3
0.18
142
809
0.61
557
907
Xiaomi Mi 4
0.17
164
940
0.73
679
929
Xiaomi Mi Note
0.09
130
1450
0.43
626
1453
Xiaomi Mi 4i
0.15
161
1063
0.51
542
1055
Oppo R1x
0.31
250
816
0.59
490
836
Samsung Galaxy A5
0
191
∞
0
398
∞
Sony Xperia M4 Aqua
0.17
176
1012
0.74
828
1115
Xiaomi Redmi 2
0.3
273
943
0.58
561
974
The sunlight legibility has been slightly improved and the Xiaomi Mi 4i's screen performs very well outdoors. You will be able to comfortably see what's happening on the screen even on the brightest day.
Xiaomi has also included a display tech for boosting the brightness of darker areas of your screen to make them more visible when there's bright light source present. It's similar to what Sony has been doing with its flagships lately only here it works throughout the interface and not just in the gallery.
Sunlight contrast ratio
Nokia 808 PureView 4.698
Samsung Galaxy E7 4.485
Samsung Galaxy A3 4.241
Samsung Galaxy S6 4.124
Samsung Galaxy Note 4 4.033
Apple iPhone 5 3.997
Samsung Galaxy Note 3 3.997
Samsung Galaxy A5 3.895
Apple iPhone 6 3.838
Motorola Moto X (2014) 3.816
Samsung Galaxy Note Edge 3.799
Samsung Galaxy A7 3.679
Oppo R5 3.678
Samsung Galaxy K zoom 3.675
Nokia Lumia 930 3.567
Apple iPhone 5s 3.565
Samsung Galaxy S5 3.549
Nokia Lumia 735 3.547
Motorola Nexus 6 3.543
Alcatel Idol X+ 3.527
Apple iPhone 5c 3.512
Samsung Galaxy Alpha 3.509
Samsung Galaxy Note 3 Neo 3.487
LG G Flex2 3.465
YotaPhone 2 3.453
Motorola RAZR MAXX 3.42
Samsung I9300 Galaxy S III 3.419
Samsung Galaxy S5 Active 3.406
Nokia Lumia 925 3.402
Gionee Elife S5.5 3.386
Samsung I9505 Galaxy S4 3.352
Samsung Omnia W 3.301
Samsung Galaxy S5 mini 3.174
Samsung I9000 Galaxy S 3.155
Samsung Ativ S 3.129
Samsung I9190 Galaxy S4 mini 3.127
Samsung Galaxy S4 zoom 3.118
Nokia N9 3.069
Microsoft Lumia 640 XL 3.065
Apple iPhone 6 Plus 3.023
Samsung Galaxy Note 2.97
Samsung Galaxy Premier 2.958
Sony Xperia Z1 2.95
HTC One S 2.901
Lenovo S90 Sisley 2.892
Samsung I8730 Galaxy Express 2.861
BlackBerry Q10 2.856
Samsung I9100 Galaxy S II 2.832
Sony Xperia Z3+ 2.824
HTC Desire Eye 2.815
Gionee Elife S5.1 2.812
Samsung Galaxy S II Plus 2.801
BlackBerry Z30 2.79
Meizu MX4 Pro 2.765
Sony Xperia ZR 2.672
Huawei Ascend P1 2.655
Xiaomi Mi 4i 2.641
Sony Xperia Z3 2.618
Sony Xperia Z3 Compact 2.616
Sony Xperia T3 2.609
BlackBerry Passport 2.595
Microsoft Lumia 640 2.563
Nokia Lumia 900 2.562
Motorola Moto G 4G 2.546
HTC One Max 2.537
Nokia Lumia 720 2.512
HTC One 2.504
Sony Xperia M4 Aqua 2.503
Motorola Moto G 2.477
vivo Xshot 2.465
Sony Xperia Z 2.462
Xiaomi Mi 4 2.424
Samsung Galaxy S III mini 2.422
Lenovo Vibe Z2 Pro 2.416
LG G Flex 2.407
HTC Desire 820 2.372
HTC One (M8) 2.371
Motorola RAZR i 2.366
Meizu MX4 2.366
Meizu m1 note 2.362
Sony Xperia ZL 2.352
HTC One M9 2.334
LG G4 2.317
Samsung Galaxy Note II 2.307
HTC One (M8) for Windows 2.291
Oppo R1x 2.281
Oppo Find 7a 2.279
Alcatel One Touch Hero 2.272
Apple iPhone 4S 2.269
HTC Desire 600 dual sim 2.262
Nokia Asha 311 2.25
Xiaomi Mi Note 2.234
Motorola Moto G (2014) 2.233
LG Nexus 5 2.228
Nokia Lumia 820 2.193
HTC One (E8) 2.185
Oppo N3 2.181
Nokia Lumia 920 2.17
Huawei Honor 6 2.169
HTC One X 2.158
Asus Zenfone 2 ZE551ML 2.149
LG Aka 2.145
Nokia N8 2.144
Nokia Lumia 620 2.142
Archos 50 Diamond 2.134
Nokia 515 2.134
HTC Desire 500 2.129
Sony Xperia C3 Dual 2.12
Sony Xperia acro S 2.119
Xiaomi Redmi Note 2.119
Nokia Lumia 1020 2.103
Oppo Find 5 2.088
Sony Xperia SL 2.078
Nokia Lumia 630 2.056
BlackBerry Z10 2.051
Huawei Ascend Mate7 2.024
Samsung I9295 Galaxy S4 Active 2.022
Apple iPhone 4 2.016
HTC One mini 2.003
Xiaomi Mi 3 2.001
Huawei Ascend P7 1.992
LG G2 1.976
Sony Xperia E4g 1.972
OnePlus One 1.961
Oppo R819 1.957
Sony Ericsson Xperia ray 1.955
Lenovo Vibe X2 1.952
Sony Xperia Z2 1.944
Sony Xperia E3 1.943
Nokia Lumia 1320 1.941
HTC One mini 2 1.94
Samsung Galaxy Camera 1.938
Samsung Galaxy Grand Prime 1.935
Sony Xperia J 1.932
Acer CloudMobile S500 1.931
ZTE Blade S6 1.927
LG Nexus 4 1.926
LG G Pro 2 1.922
Samsung Galaxy Mega 6.3 1.913
Nokia Asha 308 1.911
HTC Butterfly 2 1.905
Sony Xperia T 1.894
Nokia Lumia 830 1.887
HTC Desire X 1.878
HTC Butterfly 1.873
HTC Windows Phone 8X 1.873
HTC Butterfly S 1.867
Huawei Ascend P6 1.865
Huawei Ascend Mate 1.845
LG G2 mini 1.838
LG G3 1.82
Nokia Lumia 1520 1.813
HTC Desire 616 dual sim 1.797
Sony Xperia V 1.792
HTC Desire 816 1.783
Sony Xperia Z1 Compact 1.772
HTC Desire 700 dual sim 1.769
Sony Xperia U 1.758
Meizu MX3 1.754
LG Optimus G 1.753
Sony Xperia T2 Ultra 1.74
Sony Xperia Z3 Tablet Compact 1.735
Acer Liquid Jade S 1.734
Sony Xperia SP 1.733
Oppo Find 7 1.691
LG Optimus 4X HD 1.691
HTC One V 1.685
BlackBerry Q5 1.682
LG Optimus Vu 1.68
Motorola Moto E (2nd Gen) 1.675
Xiaomi Mi Pad 7.9 1.672
LG Optimus GJ 1.666
LG Optimus 3D Max 1.658
HTC Desire V 1.646
Samsung Galaxy Xcover 2 1.632
Samsung Galaxy Ace 3 1.622
Microsoft Lumia 532 1.615
Jolla Jolla 1.605
Microsoft Lumia 435 1.598
Sony Xperia Z Ultra 1.578
Sony Xperia go 1.577
Samsung Galaxy Ace 2 I8160 1.566
Samsung Galaxy Core 1.563
LG Optimus G Pro 1.552
Motorola Moto E 1.545
LG Optimus 3D 1.542
Nokia Asha 302 1.537
Samsung Galaxy Core Prime 1.507
BlackBerry Curve 9320 1.488
Sony Xperia M 1.473
Oppo N1 1.47
Sony Xperia E4 1.467
Meizu MX 4-core 1.462
Nokia Lumia 610 1.432
Samsung Galaxy S Duos 1.4
Microsoft Lumia 535 1.393
Sony Xperia M2 1.393
Samsung Galaxy Grand Neo 1.393
Samsung Galaxy Grand 2 1.38
Sony Xperia E1 1.372
Nokia Lumia 625 1.371
Gigabyte GSmart G1355 1.361
Sony Xperia L 1.351
Samsung Galaxy Mega 5.8 1.35
Xiaomi Redmi 1S 1.35
HTC Desire 510 1.34
Sony Xperia M2 Aqua 1.331
Sony Xperia miro 1.324
Samsung I9082 Galaxy Grand 1.321
Samsung I8530 Galaxy Beam 1.315
Xiaomi Redmi 2 1.311
HTC Desire C 1.3
Nokia X 1.291
Sony Xperia C 1.283
Nokia Asha 503 1.281
Nokia Asha 501 1.27
LG Optimus L7 1.269
Nokia Lumia 510 1.268
Samsung Galaxy Fame 1.245
LG Optimus L9 1.227
Meizu MX 1.221
Samsung Galaxy Young 1.22
Sony Xperia E 1.215
Nokia XL 1.204
Sony Xperia E dual 1.203
Asus Memo Pad 7 ME176C 1.198
Samsung Galaxy Pocket 1.18
Nokia Asha 305 1.178
Nokia Asha 306 1.175
Sony Xperia neo L 1.169
Sony Xperia tipo 1.166
Nokia Lumia 520 1.161
Samsung S6802 Galaxy Ace Duos 1.148
Samsung Galaxy mini 2 1.114
Connectivity
The Xiaomi Mi 4i supports 6 LTE bands and you can tap to an LTE network on either SIM, but the other will default to a GSM band. The Mi 4i also offers quad-band GSM connectivity and tri-band 3G connectivity with HSPA support.
The rest of the connectivity features include dual-band Wi-Fi a/b/g/n/ac support and Wi-Fi Direct. There is also support for Bluetooth 4.1, GPS and GLONASS, plus an FM radio.
A microUSB 2.0 port handles charging and data connections. Media transfer mode is supported for accessing the phone's built-in memory over a USB connection. The microUSB port also supports USB On-the-go for connecting USB peripherals such as pen drives, keyboards or real USB hard drives.
Wireless screen mirroring is available via the Miracast protocol.
Battery life
Xiaomi has put a 3,120mAh battery inside the Mi 4i, a solid capacity for a 5" device. In our battery test the Xiaomi Mi 4i scored a 64h rating, which means you can count on a little over two and a half days if you do an hour each of calling, browsing and video playback a day.
Opting for using the device with just one SIM card active, you can squeeze a little more out of the battery. The single-SIM endurance rating is 67 hours.
Our proprietary test also measures the battery draw in standby, which is not featured in the scorecard but is calculated in the overall rating.
The battery testing procedure is described in detail in case you're interested in the nitty-gritties.
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