Samsung Galaxy A51 vs Samsung Galaxy A21s
Compare phone and tablet specifications of up to three devices. Type a model name in the search field of our phone comparison tool or pick a popular device from the ones below.
Display
Size
Resolution
Technology
Super AMOLED
AMOLED
Screen-to-body
87.37 %
82.94 %
Features
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor
Hardware & Performance
System chip
Samsung Exynos 9611
Samsung Exynos 850
Processor
GPU
Mali-G72 MP3
Mali-G76
RAM
Internal storage
128GB
32GB (eMMC 5.1)
Storage expansion
microSDXC up to 512 GB
microSDXC up to 512 GB
OS
Android (10), Samsung One UI
Android (10), Samsung One UI
Battery
Capacity
4000 mAh
5000 mAh
Type
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Charging
Fast charging
Fast charging
Camera
Rear
Quad camera
Quad camera
Main camera
Specifications
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Second camera
12 MP (Ultra-wide)
8 MP (Ultra-wide)
Specifications
Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm
Third camera
5 MP (Macro)
2 MP (Macro)
Specifications
Aperture size: F2.4; Focal Length: 40 mm
Aperture size: F2.4
Fourth camera
5 MP (Depth information)
2 MP (Depth information)
Specifications
Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.4
Video recording
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
1920x1080 (Full HD)
Features
Hyperlapse, EIS
Front
32 MP (HDR)
13 MP
Design
Dimensions
Weight
the average is 6.5 oz (184 g)
the average is 6.5 oz (184 g)
Materials
Back: Plastic; Frame: Plastic
Biometrics
2D Face unlock, In-screen fingerprint
2D Face unlock, Fingerprint (touch)
Colors
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Black, White, Blue, Red
Cellular
LTE (FDD)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)
LTE (TDD)
Bands 38(2600), 39(1900+), 41(2600+)
UMTS
850, 900, 1700/2100, 1900, 2100 MHz
Data Speed
Dual SIM
Yes
SIM type
Nano SIM
Nano SIM
Multimedia
Headphones
3.5mm jack
3.5mm jack
Features
Dolby Atmos
Connectivity & Features
Bluetooth
5.0
5.0
Wi-Fi
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 b, g, n; Wi-Fi Direct, Hotspot
USB
Type-C (reversible), USB 2.0
Yes
Features
Charging, OTG
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer
Other
NFC, ANT+
Shopping information
MSRP
$ 400
