Xiaomi Mi 8 vs Samsung Galaxy A21s 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.

7.5
Samsung Galaxy A21s
Xiaomi Mi 8 Samsung Galaxy A21s
Released · Jun 05, 2018
Released · Jun 19, 2020
6.2-inch
6.5-inch
Dual camera
Quad camera
6GB · 256GB
3GB · 32GB
3400 mAh
5000 mAh

Design

Dimensions
6.10 x 2.94 x 0.30 inches
154.9 x 74.8 x 7.6 mm
6.44 x 2.96 x 0.35 inches
163.7 x 75.3 x 8.9 mm
Weight
6.17 oz (175.0 g) 6.77 oz (192.0 g)
Materials
Back: Glass (Corning Gorilla Glass 5)
Biometrics
2D Face unlock, Fingerprint (touch) 2D Face unlock, Fingerprint (touch)
Keys
Right: Volume control, Lock/Unlock key Right: Volume control, Lock/Unlock key
Colors
Black, Gold, Blue, White Black, White, Blue, Red

Display

Size
6.2-inch 6.5-inch
Resolution
2248x1080px, 402 PPI 1600x720px, 20:9 ratio, 270 PPI
Technology
AMOLED TFT
Screen-to-body
83.66 % 82.94 %
Peak brightness
600 cd/m2 (nit)
Features
HDR support, Pressure-sensitive, Oleophobic coating, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 845 SDM845 (10 nm) Samsung Exynos 850
Processor
Octa-core
2800 MHz
Kryo 385
Octa-core
8x 2.0GHz Cortex-A55
GPU
Adreno 630 Mali-G76
RAM
6GB (LPDDR4) 3GB (LPDDR4)
Internal storage
256GB 32GB (eMMC 5.1), available to use: 19.5 GB
Storage expansion
microSDXC up to 512 GB
OS
Android (10, 9.0 Pie, 8.0 Oreo) Android (10), Samsung One UI

Battery

Capacity
3400 mAh 5000 mAh
Type
Li - Polymer Li - Polymer
Charging
Qualcomm Quick Charge 4+ Fast charging
PhoneArena Battery Tests
Battery Life Estimate
Untested
Browsing
Untested
Video
Untested
Gaming
Untested
Battery Life Estimate
Untested
Browsing
Untested
Video
11h 9min
Gaming
7h 48min

Camera

Rear
Dual camera Quad camera
Main camera
12 MP (OIS, PDAF)
Aperture size: F1.8
Sensor size: 1/2.55"
Pixel size: 1.4 μm
48 MP (PDAF)
Aperture size: F2.0
Focal length: 26 mm
Sensor size: 1/2"
Pixel size: 0.8 μm
Second camera
12 MP (Telephoto, Autofocus)
Optical zoom: 2.0x
Aperture size: F2.4
Focal Length: 56 mm
Sensor size: 1/3.4"
Pixel size: 1 μm
8 MP (Ultra-wide)
Aperture size: F2.2
Sensor size: 1/4"
Pixel size: 1.12 μm
Third camera
2 MP (Macro)
Aperture size: F2.4
Fourth camera
2 MP (Depth information)
Aperture size: F2.4
Flash
LED LED
Video recording
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)
Video calling, Video sharing
1920x1080 (Full HD) (30 fps)
Front
20 MP (HDR) 13 MP, Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
5.0 5.0
WLAN
802.11 a,b,g,n,ac,dual-band
MIMO, Wi-Fi Direct, Hotspot
802.11 a,b,g,n,ac,dual-band
Wi-Fi Direct, Hotspot
USB
Type-C Type-C, USB 2.0
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), Barometer Accelerometer, Gyroscope
Other
NFC, VoIP, Tethering, Computer sync, OTA sync NFC

Multimedia

Headphones
No 3.5mm jack 3.5mm jack
Speakers
Earpiece, Loudspeaker Earpiece, Loudspeaker
Features
Album art cover, Background playback
Screen mirroring
Wireless screen share Wireless screen share
Additional microphone(s)
Noise cancellation

Cellular

4G (FDD)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 17(700 b), 20(800 DD) Bands 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)
4G (TDD)
Bands 34(2000), 38(2600), 39(1900+), 40(2300), 41(2600+) Bands 38(2600), 40(2300), 41(2600+)
3G
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900) Bands 1(2100), 2(1900), 5(850), 8(900)
Data Speed
LTE-A Pro Cat 16 (1000/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
Yes Yes
SIM type
Nano SIM Nano SIM
HD Voice
Yes
VoLTE
Yes

Buyers information

MSRP
€ 240
In The Box
Mi 8 Protective cover / Power adapter / USB Type-C cable / Type-C to audio converter / SIM insertion tool / User guide

Availability

Officially announced
May 31, 2018 May 15, 2020

Alternative variants

with 64 GB storage
Internal storage 64GB
with 4GB RAM
RAM 4GB
Internal storage 64GB
with 128 GB storage
Internal storage 128GB
with 6GB RAM
RAM 6GB
Internal storage 64GB
RAM 8GB
Internal storage 128GB
Capacity 3000 mAh
Weight 6.24 oz (177.0 g)
Biometrics Optical in-screen fingerprint
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