Xiaomi Mi A2 vs Samsung Galaxy A51

$256.85 VIEW ON eBay
$404.61 VIEW ON AMAZON $303.99 VIEW ON eBay

Display

Size

6.0 inches
6.5 inches

Resolution

2160 x 1080 pixels, 18:9 ratio,
403 PPI
2400 x 1080 pixels, 20:9 ratio,
405 PPI

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

Octa-core, 2200 MHz, Kryo 260, 64-bit, 14 nm
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm

GPU

Adreno 512
Mali-G72 MP3

RAM

6GB LPDDR4
4GB LPDDR4

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

12 MP
48 MP

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

6.25 x 2.97 x 0.29 inches (158.7 x 75.4 x 7.3 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)

Weight

5.93 oz (168 g)
the average is 6.3 oz (179 g)
6.07 oz (172 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

LTE-A, HSPA, HSUPA
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

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

FCC approval

 
 

Date approved

 
Nov 28, 2019

 
FCC ID value: A3LSMA515FN link

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
This copy is for your personal, non-commercial use only. You can order presentation-ready copies for distribution to your colleagues, clients or customers at https://www.parsintl.com/phonearena or use the Reprints & Permissions tool that appears at the bottom of each web page. Visit https://www.parsintl.com/ for samples and additional information.
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