Phone Comparison - Samsung Galaxy S8 vs Samsung Galaxy A51 vs Samsung Galaxy A21

Price Comparison (India) -

general General Info

Manufacturer Samsung Samsung Samsung
Announced March 2017 December 2019 2020, April 8
Status Available - April 2017 Coming Soon - December 12, 2019 Coming soon. Exp. release 2020, April
Price Rs. 57,900 ($720.00) [Similarly Priced] Rs. 23,999 ($0.00) [Similarly Priced] -
Colors Black, White, Gold, Silver, Pink Gold Prism Crush White, Black, Pink, Blue Various
Form Factor Candybar Candybar Candybar
Dimension 148.9 x 68.1 x 8 mm
(5.86 x 2.68 x 0.31 in)
158.4 x 73.7 x 7.9 mm
(6.24 x 2.9 x 0.31 in)
-
Weight 155 g (5.47 oz) 172 g (6.07 oz) -
SIM Type Dual-SIM Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by)
2G Network GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM only)
3G Network HSDPA HSDPA 850 / 900 / 1900 / 2100
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
HSDPA 850 / 900 / 1900 / 2100
HSDPA 850 / 1700(AWS) / 1900 / 2100
4G Network LTE LTE (unspecified) LTE
Messaging SMS, MMS, EMail, IM
Build Features - - Fingerprint Sensor(In-display)
- Fingerprint Sensor
Glass front, plastic back, plastic frame
Notification LED Yes - -

hardware Hardware and OS

OS Android OS, v7.0 (Nougat) Android 9.0 (Pie) Android 10.0
User Interface - One UI One UI 2.0
Processor Octa-core (4x2.35 GHz Kryo & 4x1.9 GHz Kryo)
Octa-core (4x2.3 GHz & 4x1.7 GHz), Qualcomm MSM8998 Snapdragon 835
Exynos 8895 Octa
Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm) Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53), Mediatek MT6765 Helio P35 (12nm)
GPU Adreno 540 Mali-G72 MP3 PowerVR GE8320
RAM 4 GB 8 GB 3 GB
Internal Memory 64 GB 128 GB 64 GB
External Memory microSD, up to 256 GB (dedicated slot) microSD, up to 512 GB (dedicated slot) microSDXC (dedicated slot)

display Display

Type Super AMOLED capacitive touchscreen, Gorilla Glass 5 Full HD+ Infinity-O Super AMOLED Capacitive Touchscreen HD+ Super AMOLED Capacitive Touchscreen
Colors 16M colors 16M colors 16M colors
Size 5.8 inches 6.5 inches 6.5 inches
Resolution 1440 x 2960 pixels (568 ppi) 1080 x 2340 pixels (396 ppi) 720 x 1600 pixels (270 ppi)
Screen-to-Body Ratio 84.06% 89.06% -
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes yes
Radio No FM radio FM radio
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes yes yes

camera Camera

Rear Camera 12 MP 48 MP + 12 MP + 5 MP + 5 MP 16 MP + 8 MP + 2 MP + 2 MP
Flash Dual-LED (Dual Tone) LED Flash No
Features Phase Detection Autofocus, OIS, f/1.7 aperture, Geo-tagging, Simultaneous 4K Video And 9MP Image Recording, Touch Focus, Face/smile Detection, Auto HDR, Panorama 48 MP, f/1.8, (wide), 1/2", 0.8µm, PDAF
12 MP, f/2.2, 13mm (ultrawide)
5 MP, f/2.2, depth sensor
5 MP, f/2.4, macro camera
Panorama, HDR
16 MP, f/1.9, 28mm (wide), AF
8 MP, f/2.2, 12mm (ultrawide)
2 MP, (macro)
2 MP, (depth)
panorama, HDR
Video 2160p@60fps, 1080p@120fps, HDR, dual-video rec. 2160p@30fps, 1080p@30fps 1080p@30fps
Front Camera 8 MP, AF [Similar] 32 MP, f/2.0, 25mm (wide)
HDR
1080p@30fps [Similar]
13 MP
HDR
1080p@30fps [Similar]

connectivity Connectivity and Data Rate

GPRS Yes Yes Yes
Edge Yes Yes Yes
3G HSPA, LTE, VoLTE HSPA, LTE-A HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Bluetooth v4.2, A2DP, LE, aptX 5.0, A2DP, LE 5.0, A2DP, LE
Wi-Fi Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
USB v3.1, Type-C 1.0 reversible connector 2.0, Type-C 1.0 reversible connector, USB On-The-Go 2.0, Type-C 1.0 reversible connector, USB On-The-Go
GPS Yes, with A-GPS, GLONASS, BDS Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS, GLONASS, BDS
Browser HTML5 Yes Yes

memory User Memory

Internal 64 GB, 4 GB RAM 128 GB, 8 GB RAM or 128 GB, 6 GB RAM or 64 GB, 4 GB RAM 64 GB, 3 GB RAM eMMC 5.1
Expandable Storage microSD, up to 256 GB (dedicated slot) microSD, up to 512 GB (dedicated slot) microSDXC (dedicated slot)
USB OTG Supported Supported Supported

Apps Sensors

Fingerprint fingerprint supported fingerprint supported fingerprint supported
Proximity Sensor proximity sensor present proximity sensor present proximity sensor present
Accelerometer Sensor accelerometer sensor present accelerometer sensor present accelerometer sensor present
Magnetic-Field Sensor (Compass) magnetic field sensor present magnetic field sensor present magnetic field sensor present
Gyroscope Sensor gyroscope sensor present gyroscope sensor present gyroscope sensor present
Barometer Sensor barometer sensor present barometer sensor not present barometer sensor not present
Heart-rate Sensor heart rate sensor present heart rate sensor not present heart rate sensor not present
NFC NFC supported NFC not supported NFC not supported

battery Battery

Type Non-removable Li-Ion battery Non-removable Li-Po Battery
Fast battery charging 15W
Non-removable Li-Po Battery
Fast battery charging 15W
Capacity 3000 mAh 4000 mAh 4000 mAh
Stand by - - -
Talk Time - - -