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Xiaomi Mi Mix 3 vs OnePlus 9 Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.

Comparison mode:
Specs Size
Differences only
8.9
Xiaomi Mi Mix 3
9.0
OnePlus 9
Xiaomi Mi Mix 3 OnePlus 9
Released · Nov 01, 2018
Released · Apr 02, 2021
6.4-inch · 2340x1080px
6.5-inch · 2400x1080px
Dual camera
Triple camera
8GB · 256GB
8GB · 128GB
3200 mAh
4500 mAh
Check prices

Availability

Officially announced
Oct 25, 2018 Mar 23, 2021
Prices (MSRP)
$729

Design

Dimensions
6.22 x 2.94 x 0.33 inches
157.89 x 74.69 x 8.46 mm 		6.30 x 2.92 x 0.34 inches
160 x 74.2 x 8.7 mm
Weight
7.69 oz / 218.0 g 6.77 oz / 192.0 g
Materials
Back: Ceramic
Frame: Aluminum 		Back: Glass (Corning Gorilla Glass)
Frame: Aluminum
Biometrics
2D Face unlock, Fingerprint (touch) 2D Face unlock, Optical in-screen fingerprint
Features
Notification light
Keys
Right: Volume control, Lock/Unlock key Left: Volume control; Right: Lock/Unlock key, Other
Colors
Black, Green, Blue Winter Mist, Arctic Sky, Astral Black

Display

Size
6.4-inch, 84.96% screen-to-body 6.5-inch, 87.27% screen-to-body
Type
Super AMOLED, HDR, 600 nits AMOLED, 120Hz, HDR
Resolution
2340x1080px, 19.5:9 ratio, 403 PPI 2400x1080px, 20:9 ratio, 402 PPI
Protection
Corning Gorilla Glass
PhoneArena Display Test
Bright Max (20% APL)
Untested Untested
Bright Min
2 (Good) 2.5 (Average)
Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
Snapdragon 845 SDM845 (10 nm) Snapdragon 888 (5 nm)
Processor
Octa-core
2800 MHz
Kryo 385 		Octa-core
2840 MHz
Kryo 680
GPU
Adreno 630 Adreno 660
Memory
8GB (LPDDR4)/256GB
6GB/256GB
8GB/256GB
10GB/256GB 		8GB (LPDDR5)/128GB (UFS 3.1)
12GB/256GB
Storage expansion
not expandable not expandable
OS
Android (9.0 Pie) Android (11)

Battery

Type
3200 mAh, Li - Polymer 4500 mAh
Charging
Qualcomm Quick Charge 4+
Qi wireless charging 		OnePlus Warp Charge
Qi wireless charging
Charge speed
Wired: 65.0W
Wireless: 15.0W
PhoneArena Battery Tests
Battery Life Estimate
Untested
Browsing
Untested
Video
Untested
Gaming
Untested
Battery Life Estimate
5h 50min
Browsing
11h 29min
Video
9h 16min
Gaming
9h 6min
Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Dual camera Triple camera
Main camera
12.2 MP (OIS, PDAF)
Aperture size: F1.8
Sensor size: 1/2.55"
Pixel size: 1.4 μm 		48 MP (PDAF)
Aperture size: F1.8
Focal length: 23 mm
Sensor size: 1/1.4"
Pixel size: 1.12 μm
Second camera
12 MP (Telephoto)
Optical zoom: 2.0x
Sensor size: 1/3.4"
Pixel size: 1 μm 		50 MP (Ultra-wide)
Aperture size: F2.2
Focal Length: 14 mm
Sensor size: 1/1.56"
Third camera
2 MP (Black and White)
Flash
Dual LED Dual LED
Video recording
4K UHD (60 fps), 1080p (960 fps), 720p (960 fps)
Time-lapse video, EIS, Video calling, Video sharing 		8K UHD (30 fps), 4K UHD (60 fps), 1080p (240 fps), 720p (480 fps)
HDR, Continuous autofocus, EIS
Front
24 MP (Dual-Camera, Flash, HDR) 16 MP (EIS)

Connectivity & Features

Bluetooth
5.0 5.2
WLAN
a,b,g,n,ac,dual-band
MIMO, Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac 		a,b,g,n,ac,Wi-Fi 6,dual-band
MIMO, Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, ax
USB
Type-C Type-C, USB 3.1
Sensors
Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor
Location
GPS, A-GPS, Glonass, Galileo, BeiDou GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Other
NFC, VoIP, Tethering, Computer sync, OTA sync NFC

Multimedia

Headphones
No 3.5mm jack No 3.5mm jack
Speakers
Earpiece, Loudspeaker Earpiece, Loudspeaker, Multiple speakers
Features
Album art cover, Background playback Dolby Atmos
Screen mirroring
Wireless screen share 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
4G (FDD) Bands
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 66, 71
4G (TDD) Bands
34, 38, 39, 40, 41 38, 39, 40, 41, 46, 48
3G Bands
6, 5, 8, 4, 3, 2, 1 1, 2, 4, 5, 8, 9, 19
Data Speed
LTE-A, HSPA, HSUPA LTE-A Pro Cat 20 (2000/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
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

Alternative variants

with 6 GB RAM
Memory 6GB
Colors Black
With 12GB RAM and 256GB storage
Memory 12GB/256GB
Prices (MSRP) $829
with 256 GB storage
Memory 256GB
Colors Black
Forbidden City Special Edition
Memory 10GB
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