Phone Comparison - Samsung Galaxy A51 vs Samsung Galaxy S21 5G vs Oppo A57

Price Comparison (India) - -

general General Info

Manufacturer Samsung Samsung Oppo
Announced December 2019 2021, January 14 April 2022
Status Coming Soon - December 12, 2019 Coming soon. Exp. release 2021, January 29 Coming Soon - April 2022
Price Rs. 23,999 ($0.00) [Similarly Priced] Rs. 69,999 ($799.99) [Similarly Priced] -
Colors Prism Crush White, Black, Pink, Blue Phantom Gray, Phantom White, Phantom Violet, Phantom Pink Black, Blue, Lilac
Form Factor Candybar Candybar Candybar
Dimension 158.4 x 73.7 x 7.9 mm
(6.24 x 2.9 x 0.31 in)
151.7 x 71.2 x 7.9 mm
(5.97 x 2.8 x 0.31 in)
163.8 x 75.1 x 8 mm
(6.45 x 2.96 x 0.31 in)
Weight 172 g (6.07 oz) 169 g (5.96 oz) 186 g (6.56 oz)
SIM Type Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) Single SIM (Nano-SIM and/or eSIM), Hybrid Dual SIM (Nano-SIM, dual stand-by) 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)
CDMA2000 1xEV-DO
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
CDMA2000 1x
3G Network HSDPA 850 / 900 / 1900 / 2100
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 800 / 850 / 900 / 1900 / 2100
4G Network LTE (unspecified) LTE 1, 3, 5, 7, 8, 28, 34, 38, 39, 40, 41
5G Network - SA/NSA/Sub6/mmWave 1, 5, 8, 28, 41, 77, 78 SA/NSA
Messaging
Build Features - Fingerprint Sensor(In-display)
- Fingerprint Sensor (under display, ultrasonic)
Samsung Pay (Visa, MasterCard certified)
IP68 dust/water resistant (up to 1.5m for 30 mins)
Samsung DeX, Samsung Wireless DeX (desktop experience support) ANT+
- Fingerprint Sensor (side-mounted)

hardware Hardware and OS

OS Android 9.0 (Pie) Android 11 Android 12
User Interface One UI One UI 3.1 ColorOS 12.1
Processor Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm) Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International / Octa-core (1x2.84 GHz Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680 - USA/China/Korea, Exynos 2100 - International / Qualcomm Snapdragon 888 - USA/China/Korea Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55), MediaTek MT6833P Dimensity 810 5G (6 nm)
GPU Mali-G72 MP3 Mali-G78 MP14 - International / Adreno 660 - USA/China/Korea Mali-G57 MC2
RAM 8 GB 8 GB 8 GB
Internal Memory 128 GB 256 GB 128 GB
External Memory microSD, up to 512 GB (dedicated slot) microSDXC (uses shared SIM slot) microSDXC

display Display

Type Full HD+ Infinity-O Super AMOLED Capacitive Touchscreen FHD+ Dynamic AMOLED 2X Display
120Hz Refresh Rate
HDR10+
1300 nits (peak)
Corning Gorilla Glass Victus
Always-on display
HD+ IPS LCD Screen
90Hz Refresh Rate
480 nits (typ), 600 nits (HBM)
Colors 16M colors 16M Colour 16M colors
Size 6.5 inches 6.2 inches 6.56 inches
Resolution 1080 x 2340 pixels (396 ppi) 1080 x 2400 pixels (424 ppi) 720 x 1612 pixels (269 ppi)
Screen-to-Body Ratio 89.06% 86.12% 84.12%
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes no yes
Radio FM radio FM radio (Snapdragon model only; market/operator dependent) No
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes

camera Camera

Rear Camera 48 MP + 12 MP + 5 MP + 5 MP 12 MP + 64 MP + 12 MP 13 MP + 2 MP
Flash LED Flash LED Flash LED Flash
Features 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
12 MP, f/1.8, 26mm (wide), 1/1.76", 1.8µm, Dual Pixel PDAF, OIS
64 MP, f/2.0, 29mm (telephoto), 1/1.72", 0.8µm, PDAF, OIS, 1.1x optical zoom, 3x hybrid zoom
12 MP, f/2.2, 13mm (ultrawide), 1.4µm, Super Steady video
Auto-HDR, Panorama
13 MP, f/2.2, 26mm (wide), 1/3.06", 1.12µm, AF
2 MP, f/2.4, (depth)
HDR, Panorama
Video 2160p@30fps, 1080p@30fps 8K@24/30fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS & OIS 1080p@30fps
Front Camera 32 MP, f/2.0, 25mm (wide)
HDR
1080p@30fps [Similar]
10 MP, f/2.2, 26mm (wide), 1/3.2", 1.22µm, Dual Pixel PDAF, Dual video call, Auto-HDR, 4K@30/60fps, 1080p@30fps [Similar] 8 MP, f/2.0, 26mm (wide)
1080p@30fps [Similar]

connectivity Connectivity and Data Rate

GPRS Yes Yes Yes
Edge Yes Yes Yes
3G HSPA, LTE-A HSPA 42.2/5.76 Mbps, LTE-A (CA), 5G HSPA 42.2/5.76 Mbps, LTE, 5G
Bluetooth 5.0, A2DP, LE 5.0, A2DP, LE 5.2, A2DP, LE, aptX HD
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/6, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
USB 2.0, Type-C 1.0 reversible connector, USB On-The-Go USB Type-C 3.2, USB On-The-Go USB Type-C 2.0, USB On-The-Go
GPS Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS, GLONASS, BDS, GALILEO Yes, with A-GPS, GLONASS, GALILEO, BDS, QZSS
Browser Yes Yes Yes

memory User Memory

Internal 128 GB, 8 GB RAM or 128 GB, 6 GB RAM or 64 GB, 4 GB RAM 256 GB, 8 GB RAM or 128 GB, 8 GB RAM UFS 3.1 128 GB, 8 GB RAM or 128 GB, 6 GB RAM UFS 2.2/2.1
Expandable Storage microSD, up to 512 GB (dedicated slot) microSDXC (uses shared SIM slot) microSDXC
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 not present barometer sensor present barometer sensor not present
NFC NFC not supported NFC supported NFC not supported

battery Battery

Type Non-removable Li-Po Battery
Fast battery charging 15W
Non-removable Li-Po Battery
Fast battery charging 25W
USB Power Delivery 3.0
Fast Qi/PMA wireless charging 15W
Power bank/Reverse wireless charging 4.5W
Non-removable Li-Po Battery
Fast battery charging
Capacity 4000 mAh 4000 mAh 5000 mAh
Stand by - - -
Talk Time - - -