OnePlus 9 vs Xiaomi Mi Mix 4 Specs Comparison

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, Optical in-screen fingerprint	Optical 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

Display

Size
6.5-inch	6.7-inch
Resolution
2400x1080px, 20:9 ratio, 402 PPI	2400x1080px, 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 (5 nm)	Qualcomm Snapdragon 888+ SM8350-AC (5 nm)
Processor
Octa-core 2840 MHz Kryo 680	Octa-core Kryo 680 Prime
GPU
Adreno 660	Adreno 660
RAM
8GB (LPDDR5)	8GB (LPDDR5)
Internal storage
128GB (UFS 3.1)	128GB (UFS 3.1)
Storage expansion
not expandable	not expandable
OS
Android (11), OxygenOS UI	Android (11), MIUI 12.5 UI

Battery

Capacity
4500 mAh	4500 mAh
Type
	Li - Ion
Charging
OnePlus Warp Charge, Qi wireless charging	Fast charging, Qi wireless charging, Reverse wireless charging
Charge speed
Wired: 65.0W Wireless: 15.0W	Wired: 120.0W Wireless: 50.0W

PhoneArena Battery Tests

Battery Life Estimate

5h 50min

Browsing

11h 29min

Video

9h 16min

Gaming

9h 6min

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Triple camera	Triple camera
Main camera
48 MP (PDAF) Aperture size: F1.8 Focal length: 23 mm Sensor size: 1/1.4" Pixel size: 1.12 μm	108 MP (OIS, Laser and PDAF) Aperture size: F1.9 Focal length: 24 mm Sensor size: 1/1.33" Pixel size: 0.8 μm
Second camera
50 MP (Ultra-wide) Aperture size: F2.2 Focal Length: 14 mm Sensor size: 1/1.56"	13 MP (Ultra-wide) Aperture size: F2.2 Focal Length: 12 mm Sensor size: 1/3.06" Pixel size: 1.12 μm
Third camera
2 MP (Black and White)	8 MP (Periscope, OIS, PDAF) Optical zoom: 5.0x
Flash
Dual LED	Dual LED
Video recording
7680x4320 (8K UHD) (30 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (480 fps) HDR, Continuous autofocus, EIS	7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (480 fps), 1280x720 (HD) (480 fps) HDR, Time-lapse video, Hyperlapse, Continuous autofocus, Object tracking
Front
16 MP (EIS)	20 MP (Under-screen), Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
5.2	5.2
WLAN
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, USB 3.1	Type-C, USB 2.0
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

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
Additional microphone(s)
Noise cancellation

Cellular

5G
Bands n1, n2, n3, n5, n7, n8, n20, n25, n28, n38, n40, n41, n48, n66, n71, n77, n78	Bands n1, n3, n5, n8, n28, n41, n77, n78, n79, SA, NSA, Sub-6
4G (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)
4G (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)
3G
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

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

MSRP
$ 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

Alternative variants

With 12GB RAM and 256GB storage

RAM	12GB
Internal storage	256GB
MSRP	$ 829

With 256GB internal storage

Internal storage	256GB

With 12GB RAM and 256GB internal storage

RAM	12GB
Internal storage	256GB

With 12GB RAM and 512GB internal storage

RAM	12GB
Internal storage	512GB

Links

Full specifications
OnePlus 9 Specs	Xiaomi Mi Mix 4 Specs
PhoneArena Review
OnePlus 9 Review
User Reviews
OnePlus 9 User Reviews