Xiaomi Mi A2 vs Samsung Galaxy A51
Display
Size
Resolution
Technology
IPS LCD
Super AMOLED
Screen-to-body
77.32 %
87.37 %
Features
Scratch-resistant glass (Corning Gorilla Glass 5), ShatterShield, Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Hardware & Performance
System chip
Qualcomm Snapdragon 660 SDM660
Samsung Exynos 9611
Processor
GPU
Adreno 512
Mali-G72 MP3
RAM
Internal storage
128GB
128GB
Available to use
107 GB
Storage expansion
microSDXC up to 512 GB
Device type
Smart phone
Smart phone
OS
Android (10, 8.1 Oreo)
Android (10), Samsung One UI
Battery
Capacity
3010 mAh
4000 mAh
Type
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Charging
Qualcomm Quick Charge 3.0
Fast charging
Talk time (4G)
32 hours
Internet use
LTE: 15 hours; Wi-Fi: 16 hours
Music playback
87.00 hours
Video playback
20.00 hours
Camera
Rear
Dual camera
Quad camera
Main camera
Features
PDAF
PDAF
Specifications
Aperture size: F1.8; Sensor size: 1/2.9"; Pixel size: 1.25 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Second camera
20 MP
12 MP
Features
Ultra-wide
Specifications
Aperture size: F1.8; Sensor size: 1/2.8"; Pixel size: 1 μm
Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Third camera
5 MP
Features
Macro
Specifications
Aperture size: F2.4; Focal Length: 40 mm
Fourth camera
5 MP
Features
Depth information
Specifications
Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm
Flash
LED
LED
Software Features
Manual focus, HDR, Panorama, Face detection, Burst mode, Night mode, Exposure compensation, ISO control, White balance presets, Shutter speed control, Touch to focus, Self-timer, Digital zoom, Geo tagging
HDR, Panorama, Night mode, Scenes, Exposure compensation, ISO control, White balance presets, Touch to focus, Digital zoom, Geo tagging
Video recording
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (30 fps), 1280x720 (HD) (120 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
Features
Video calling, Video sharing
Hyperlapse, EIS
Front
20 MP
32 MP
Features
Flash, HDR
HDR
Video capture
1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps)
Design
Form factor
Candybar
Candybar
Dimensions
Weight
the average is 6.3 oz (179 g)
the average is 6.3 oz (179 g)
Materials
Back: Aluminum
Back: Plastic; Frame: Plastic
Biometrics
Fingerprint (touch)
2D Face unlock, In-screen fingerprint
Keys
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors
Black, Gold, Pink, Blue, Red
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Cellular
LTE (FDD)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 20(800 DD)
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), 20(800 DD), 26(850+), 28(700 APT), 66(AWS-3)
LTE (TDD)
Bands 38(2600), 40(2300)
Bands 38(2600), 40(2300), 41(2600+)
UMTS
850, 900, 1800, 1900 MHz
850, 900, 1700/2100, 1900, 2100 MHz
GSM
850, 900, 1800, 1900 MHz
850, 900, 1800, 1900 MHz
Data Speed
2G Data
EDGE, GPRS
EDGE, GPRS
Dual SIM
Yes
Yes
SIM type
Nano SIM
Nano SIM
Global Roaming
Yes
Yes
Multimedia
Headphones
No 3.5mm jack
3.5mm jack
Speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features
Album art cover, Background playback
Dolby Atmos
Screen mirroring
Wireless screen share
Wireless screen share
Radio
FM
FM
Additional microphone(s)
for Noise cancellation
for Noise cancellation
Connectivity & Features
Bluetooth
5.0
5.0
Profiles/ Protocols
Advanced Audio Distribution (A2DP), Audio/Visual Remote Control Profile (AVRCP), Generic Access (GAP), Handsfree (HFP), Headset (HSP), Message Access Profile (MAP), Object Push (OPP), Phone Book Access (PBAP)
Advanced Audio Distribution (A2DP), Audio/Visual Remote Control Profile (AVRCP), Generic Access (GAP), Handsfree (HFP), Headset (HSP), Message Access Profile (MAP), Object Push (OPP), Phone Book Access (PBAP)
Wi-Fi
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
USB
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0
Features
Charging, Headphones port, Mass storage device
Charging, OTG
Location
GPS, A-GPS, Glonass, BeiDou
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Other
Infrared, VoIP, Tethering, Computer sync, OTA sync
NFC, ANT+
Regulatory Approval
Measured SAR
Head
0.89 W/kg
Body
1.18 W/kg
Simultaneous Transmission
1.56 W/kg
Wireless Router
1.12 W/kg
Phablet
2.76 W/kg
Shopping information
In The Box
Power adapter, USB cable, SIM eject too, Type-C to Audio adapter, User guide, Clear soft case
Availability
Officially announced
Jul 24, 2018
Dec 12, 2019
