Realme 9i vs Xiaomi Mix 4

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800
3G network

HSDPA 850, 900, 2100

HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xEV-DO
4G network

LTE frequency band 1, 3, 5, 8, 38, 40, 41

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42
5G network

-

5G band 1, 3, 5, 8, 28, 41, 77, 78, 79 SA/NSA/Sub6
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A

LTE-A, 1174 Mbps download, 210 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Class 8

Design
Build

Glass front, plastic frame, plastic back

Glass front (Gorilla Glass Victus), ceramic back, aluminum frame
SIM

Dual SIM (Nano-SIM, dual stand-by)

Dual SIM (Nano-SIM, dual stand-by)
Height

164.4 mm

162.6 mm
Width

75.7 mm

75.4 mm
Thickness

8.4 mm

8 mm
Weight

190 g

225 g
Splash resistant

-

IP53
Dust proof

-

IP53
Colors

Black, Blue

Black, Gray, White

Display
Display type

IPS LCD

AMOLED
Physical size

6.6 inches

6.67 inches
Resolution

1080 x 2412 pixels

1080 x 2400 pixels
Pixel density

400 ppi

395 ppi
Display colors

16777216

1073741824
Protection

Scratch resistant

Scratch resistant, 3D curved glass screen, Corning Gorilla Glass Victus
Display features

90Hz, 480 nits (typ)

120Hz, HDR10+, Dolby Vision, 800 nits (HBM), Wide color gamut, True-tone

Main camera
Camera type

Triple

Triple
Main camera

(wide) , 50 MP, f/1.8 , 26 mm, 1/2.76" , 0.64 µm

(wide) , 108 MP, f/1.9 , 24 mm, 1/1.33" , 0.8 µm
(macro) , 2 MP, f/2.4

(periscope telephoto) , 8 MP, f/4.1 , 120 mm, 5x optical zoom
(depth) , 2 MP, f/2.4

(ultrawide) , 13 MP, f/2.2 , 123˚ , 12 mm, 1/3.06" , 1.12 µm
Primary camera video

1080p@30fps

8K@24fps, 4K@30/60fps, 1080p@30/60/120/480fps; gyro-EIS, HDR10+
Primary camera flash

LED flash

dual-LED flash
Camera features

Autofocus, digital zoom, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus

Autofocus, continuous shooting, digital zoom, optical zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus, laser autofocus, AI 2.0, night mode 2.0, stagger HDR

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 16 MP, f/2.1 , 1/3.0" , 1.0 µm

(wide) , 20 MP, 1/3.4" , 0.8 µm, 27 mm
Selfie camera resolution

-

5184 x 3880 pixels
Selfie camera features

-

Face unlock, HDR
Selfie camera video

1080p@30fps

1080p@30fps

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

-

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

-
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

aptX HD
Infrared

-

Yes
NFC

No

Yes
GPS

Yes, with A-GPS

Yes, with dual-band A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

-
BDS

Yes

Yes
QZSS

-

Yes
NavIC

-

Yes