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OnePlus 9 vs Xiaomi Mi Mix 4

Compare phone and tablet specifications of up to three devices at once.

Display

Size:

6.5 inches
6.7 inches

Resolution:

2400 x 1080 pixels, 20:9 ratio, 402 PPI
2400 x 1080 pixels, 20:9 ratio, 395 PPI

Technology:

AMOLED
AMOLED

Refresh rate:

120Hz
120Hz

Screen-to-body:

87.27 %
87.59 %

Features:

HDR support, Scratch-resistant glass (Corning Gorilla Glass), Ambient light sensor, Proximity sensor
HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 888
Qualcomm Snapdragon 888+ SM8350-AC

Processor:

Octa-core, 2840 MHz, Kryo 680, 64-bit, 5 nm
Octa-core, 3000 MHz, Kryo 680 Prime, 64-bit, 5 nm

GPU:

Adreno 660
Adreno 660

RAM:

8GB LPDDR5
8GB LPDDR5

Internal storage:

128GB (UFS 3.1), not expandable
128GB (UFS 3.1), not expandable

Device type:

Smartphone
Smartphone

OS:

Android (11), OxygenOS UI
Android (11), MIUI 12.5 UI

Battery

Capacity:

4500 mAh
4500 mAh

Type:

Not user replaceable
Li - Ion, Not user replaceable

Charging:

OnePlus Warp Charge, Qi wireless charging
Fast charging, Qi wireless charging, Reverse wireless charging

Max charge speed:

Wired: 65.0W; Wireless: 15.0W
Wired: 120.0W; Wireless: 50.0W

Camera

Rear:

Triple camera
Triple camera

Main camera:

48 MP (PDAF)
108 MP (OIS, Laser and PDAF)

Specifications:

Aperture size: F1.8; Focal length: 23 mm; Sensor size: 1/1.4"; Pixel size: 1.12 μm
Aperture size: F1.9; Focal length: 24 mm; Sensor size: 1/1.33"; Pixel size: 0.8 μm

Second camera:

50 MP (Ultra-wide)
8 MP (Periscope, OIS, PDAF)

Specifications:

Aperture size: F2.2; Focal Length: 14 mm; Sensor size: 1/1.56"
Optical zoom: 5.0x

Third camera:

2 MP (Black and White)
13 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/3.06"; Pixel size: 1.12 μm

Video recording:

7680x4320 (8K UHD) (30 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (480 fps)
7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (480 fps), 1280x720 (HD) (480 fps)

Features:

HDR, Continuous autofocus, EIS
HDR, Time-lapse video, Hyperlapse, Continuous autofocus, Object tracking

Front:

16 MP (EIS)
20 MP (Under-screen)

Video capture:

1920x1080 (Full HD)

Design

Dimensions:

6.30 x 2.92 x 0.34 inches (160 x 74.2 x 8.7 mm)
6.40 x 2.97 x 0.31 inches (162.6 x 75.4 x 8 mm)

Weight:

6.77 oz (192.0 g)
7.94 oz (225.0 g)

Materials:

Back: Glass (Corning Gorilla Glass); Frame: Aluminum
Back: Ceramic; Frame: Aluminum

Resistance:

Splash, Dust; IP53

Biometrics:

2D Face unlock, In-screen fingerprint
In-screen fingerprint

Keys:

Left: Volume control; Right: Lock/Unlock key, Other
Right: Volume control, Lock/Unlock key

Colors:

Winter Mist, Arctic Sky, Astral Black
Ceramic Black, Ceramic White, Shadow Gray

Cellular

5G:

n1, n2, n3, n5, n7, n8, n20, n25, n28, n38, n40, n41, n48, n66, n71, n77, n78
n1, n3, n5, n8, n28, n41, n77, n78, n79, SA, NSA, Sub-6

LTE (FDD):

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 30(2300 WCS), 32(1500 L-band), 66(AWS-3), 71(600)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 8(900), 12(700 a), 17(700 b), 18(800 Lower), 19(800 Upper), 20(800 DD), 26(850+), 28(700 APT)

LTE (TDD):

Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)
Bands 34(2000), 38(2600), 39(1900+), 40(2300), 41(2600+), 42(3500)

UMTS:

Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900), 9(1700), 19(800)
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 6(800), 8(900), 19(800)

Data Speed:

LTE-A Pro Cat 20 (2000/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
LTE-A, HSDPA+ (4G) 42.2 Mbit/s

Dual SIM:

Yes

SIM type:

Nano SIM
Nano SIM

HD Voice:

Yes

VoLTE:

Yes

Multimedia

Headphones:

No 3.5mm jack
No 3.5mm jack

Speakers:

Earpiece, Loudspeaker, Multiple speakers
Earpiece, Multiple speakers

Features:

Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share

Additional microphone(s):

for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

5.2
5.2

Wi-Fi:

802.11 a, b, g, n, ac, ax (Wi-Fi 6), dual-band; MIMO, Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, ax (Wi-Fi 6); MIMO, Wi-Fi Direct, Hotspot

USB:

Type-C (reversible), USB 3.1
Type-C (reversible), USB 2.0

Features:

Charging, Headphones port, Mass storage device
Charging

Location:

GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, QZSS, NavIC, Cell ID, Wi-Fi positioning

Sensors:

Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer

Other:

NFC
NFC

Regulatory Approval

FCC approval:

Date approved:

Mar 24, 2021

FCC ID value:

2ABZ2-EF136

Measured SAR:

Head:

1.20 W/kg

Body:

0.78 W/kg

Simultaneous Transmission:

1.48 W/kg

Wireless Router:

1.18 W/kg

Buyers information

Price:

$ 729

In The Box:

Warp Charge 65 Power Adapter, Warp Charge Type-C to Type-C Cable, Quick Start Guide, Welcome Letter, Safety Information and Warranty Card, OnePlus Sticker, SIM Tray Ejector
Power adapter, USB Type-C data cable, Type-C to 3.5mm headphone cable, Mobile phone protective shell, Film (covered on the screen), Pins, Instructions (including three packs of certificates)

Availability

Officially announced:

Mar 23, 2021
Aug 10, 2021
FCC OKs Cingular\'s purchase of AT&T Wireless