Oppo F21 Pro 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, 391 Mbps download, 150 Mbps upload

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

Yes

Yes
EDGE

Yes

Class 8

Design
Build

Aluminium alloy, glass

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

159.9 mm

162.6 mm
Width

73.2 mm

75.4 mm
Thickness

7.5 mm

8 mm
Weight

175 g

225 g
Waterproof

IPX4

-
Splash resistant

-

IP53
Dust proof

IPX4

IP53
Build features

RGB ring light around the camera (notifications, charging progress)

-
Colors

Black, Orange

Black, Gray, White

Display
Display type

AMOLED

AMOLED
Physical size

6.43 inches

6.67 inches
Resolution

1080 x 2400 pixels

1080 x 2400 pixels
Pixel density

409 ppi

395 ppi
Display colors

16777216

1073741824
Protection

Corning Gorilla Glass 5

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

90Hz, 430 nits (typ), 600 nits (HBM), 800 nits (peak)

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

Main camera
Camera type

Triple

Triple
Main camera

(wide) , 64 MP, f/1.7 , 79˚ , 26 mm, 1/2.0" , 0.7 µm

(wide) , 108 MP, f/1.9 , 24 mm, 1/1.33" , 0.8 µm
(microscope) , 2 MP, f/3.3 , 65˚

(periscope telephoto) , 8 MP, f/4.1 , 120 mm, 5x optical zoom
89˚ , (depth) , 2 MP, f/2.4 , 1.75 µm

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

9280 x 6920 pixels

-
Primary camera video

1080p@30fps, gyro-EIS

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

LED flash

dual-LED flash
Camera features

Autofocus, continuous autofocus, continuous shooting, digital zoom, digital image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro-mode, phase detection autofocus, contrast 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) , 32 MP, f/2.4 , 24 mm, 1/2.74" , 0.7 µm

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

-

5184 x 3880 pixels
Selfie camera features

Face unlock, HDR

Face unlock, HDR
Selfie camera video

1080p@30fps, gyro-EIS

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

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

-
Bluetooth

v5.1

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD

aptX HD
Infrared

-

Yes
NFC

Yes

Yes
GPS

Yes, with A-GPS

Yes, with dual-band A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

-
BDS

Yes

Yes
QZSS

Yes

Yes
NavIC

-

Yes

Features
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity

Accelerometer, color spectrum, compass, fingerprint, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4500 mAh

4500 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

SuperVOOC, 33W (100% in 60 min)

Quick Charge 4 (100% in 15 min)
Reverse charging

Yes

-
Fast wireless charging

-

Yes (100% in 28 min)