Compare Samsung Galaxy A21s

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Photos relative in size Front Side Back	Samsung Galaxy A21s‎ $ 219.99	Xiaomi Redmi Note 10S‎ $ 129.99	Samsung Galaxy S7‎ $ 269.99

Dimensions	163.7 x 75.3 x 8.9 mm	160.46 x 74.5 x 8.29 mm	142.4 x 69.6 x 7.9 mm
Weight	192 grams	178.8 grams	152 grams
Stand-by	depends on usage	depends on usage	depends on usage
Talk time	depends on usage	depends on usage	depends on usage
Design type
Monoblock
Controls
Facial unlock
Fingerprint recognition
Touchscreen	Multi-touch, Capacitive	Multi-touch, Capacitive	Multi-touch, Capacitive
Voice command
Voice dialing
Directional key
Operating system
Android		11	7.0 (Nougat)
User interface
One UI
MIUI		12.5
Display
Auto-rotate
Color display	Adjustable display brightness, 16.777.216 colors (24 bits), Infinity-O Display, Hole-punch display	Adjustable display brightness, 16.777.216 colors (24 bits), DotDisplay, DCI-P3, Hole-punch display	Adjustable display brightness, 16.777.216 colors (24 bits), Quad HD Super AMOLED, Always On feature
Size	6.5 inch	6.43 inch	5.1 inch
Resolution	1600 x 720 pixels	2400 x 1080 pixels	2560 x 1440 pixels
Aspect ratio	20:9	20:9	16:9
Peak brightness		1100 nits
Pixels Per Inch (PPI)	270	409	576
Screen-to-body ratio	82.8%	83.5%	72.3%
Hardware
Camera	Viervoudige camera-sensor, Auto focus, Image stabilization, Blink Shot, Digital zoom, Effects/camera settings, Flash, Geotagging, Face recognition, Quality settings, Macro mode, Mosaic photo, Burst (Continuous) Shooting, Night mode, Panoramic photo, Portrait mode, Smile Shot, Video recorder, self-timer	Viervoudige camera-sensor, Auto focus, Image stabilization, Digital zoom, Effects/camera settings, Flash, Geotagging, Face recognition, Quality settings, Macro mode, Burst (Continuous) Shooting, Night mode, Panoramic photo, Portrait mode, Video recorder, self-timer	Auto focus, Image stabilization, Blink Shot, Digital zoom, Effects/camera settings, Flash, Geotagging, Face recognition, Quality settings, Macro mode, Mosaic photo, Burst (Continuous) Shooting, Night mode, Panoramic photo, Portrait mode, Smile Shot, Video recorder, self-timer
Type	2 MP + 2 MP + 48 MP + 8 MP	2 MP + 2 MP + 64 MP + 8 MP	12.2 MP
Angle of view (AOV)		118°
DxOMark score		92
F-number	f/2.0 + f/2.2 + f/2.4 + f/2.4	f/1.79 + f/2.2 + f/2.4 + f/2.4	f/1.7
Max. resolution	(camera) 8000 x 6000 pixels + (video) 3840 x 1644 pixels	(camera) 9248 x 6936 pixels + (video) 3840 x 2160 pixels	(camera) 4032 x 3024 pixels + (video) 3840 x 2160 pixels
Haptic feedback
Integrated antenna
Processor	Octa core	MediaTek Helio G95, Octa core	Samsung Exynos 8890, Octa core
Clock Frequency	2.0 GHz	2.05 GHz
Secondary camera
Type	13 MP	13 MP	5 MP
F-number	f/2.2	f/2.45	f/1.7
Max. resolution	(camera) 4208 x 3120 pixels	(camera) 4208 x 3120 pixels + (video) 1920 x 1080 pixels	(camera) 2592 x 1944 pixels + (video) 1920 x 1080 pixels
Materials
Gorilla Glass
Dust and waterproof		IP53	IP68
Telephony
Dual SIM
Flight mode
Integrated handsfree speaker
nano-SIM (4FF)
Vibrating alert
Videoconferencing
Operating frequency
Quad band
Data network
4G (LTE)		Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41	Cat 9 (452 Mbps)
EDGE
GPRS
HSDPA			Cat20 42 Mbps
HSUPA			Cat6 5.76 Mbps
UMTS
Personalisation
Multiple homescreens
Widgets
Personal Information Management (PIM)
Agenda
Alarm clock
Calculator
Contact list
Date and time notation
Document viewer	Excel files, PowerPoint files, PDF files, Word files	Excel files, PowerPoint files, PDF files, Word files	Excel files, PowerPoint files, PDF files, Word files
Phonebook with groups
Photo phonebook
Reminder list
Stopwatch & countdown timer
To-do list
Voice memo
Available applications
Image editor
Java application support
Movie editor
Photo album
Video codec support	H.263, H.264, MPEG-4	MPEG-4, Xvid	DivX, H.263, H.264, MPEG-4, Sorenson Spark, VC-1, VP8
Video file support	3GP, 3G2, ASF, AVI, FLV, M4V, MKV, MP4, WebM, WMV	M4V, MKV	3GP, ASF, AVI, FLV, MKV, MP4, WebM, WMV
Messaging
E-mail	POP3, SMTP, IMAP4	POP3, SMTP, IMAP4	POP3, SMTP, IMAP4
Instant messaging	Google Talk	Google Talk	Google Talk
MMS	Video MMS	Video MMS	Video MMS
Predictive Text Input	T9	T9	T9
SMS	Group messaging, Receive and send concatenated messages	Group messaging, Receive and send concatenated messages	Group messaging, Receive and send concatenated messages
Internet
Internet browser
RSS reader
YouTube support
Navigation
A-GPS
Beidou
Build-in navigation system	Google Maps, Google Maps Navigation	Google Maps, Google Maps Navigation	Google Maps, Google Maps Navigation
Digital Compass
Galileo
GLONASS
GPS receiver
Audio
Audio codec support	AAC, AAC+, eAAC+, AMR, FLAC, MIDI, Mobile XMF, MP3 VBR, OGG Vorbis, OTA, RTTL/RTX	AAC, AMR, FLAC, MP3 VBR	AAC, AAC+, AC3, eAAC+, AMR, FLAC, MIDI, Mobile XMF, MP3 VBR, OGG Vorbis, RTTL/RTX
Audio file support	M4A, MP3, WAV, WMA	MP4, WAV	M4A, MP3, WAV, WMA
Polyphonic ringtones	MP3 ringtones	MP3 ringtones	MP3 ringtones
Stereo speakers
Build-in memory
Internal memory
Size (RAM)	3 GB + 4 GB	6 GB + 8 GB	4 GB
Storage	32 GB + 64 GB	128 GB + 64 GB	32 GB + 64 GB
Memory card slot	MicroSDHC memory card
Connections
Audio jack plug	3.5 mm	3.5 mm	3.5 mm
USB	v2.0, Type-C	Type-C	v3.0, microUSB
Connectivity
Bluetooth	v5.0, Advanced Audio Distribution Profile (A2DP)	v5.0, Advanced Audio Distribution Profile (A2DP)	v4.2, Advanced Audio Distribution Profile (A2DP)
Synchronisation	ActiveSync, SyncML		ActiveSync, SyncML
Tethering
WAP	2.0	2.0	2.0
Wireless Lan (WLAN/Wi-Fi)	Wi-Fi 5 (802.11ac), WiFi Direct support	Wi-Fi 5 (802.11ac), WiFi Direct support	Wi-Fi 5 (802.11ac), WiFi Direct support
Infrared
NFC
DLNA support
PictBridge
Power supply
Battery	Li-ion	Li-ion	Li-ion
Capacity	5000 mAh	5000 mAh	3000 mAh
Fast charging			Qualcomm Quick Charge, Samsung Adaptive Fast Charging
Max. power	15 Watt	33 Watt
Wireless charging
Sensors
Ambient light sensor
Gesture recognition
Proximity sensor
Gyroscope
Barometer
Heart rate monitor
Hygrometer