Phone Comparison - Samsung Galaxy A51 vs Xiaomi Redmi Note 9 Pro (Global Version) vs Samsung Galaxy A21s

Price Comparison (India) - -

general General Info

Manufacturer Samsung Xiaomi Samsung
Announced December 2019 April 2020 Expected Announcement - May 2020
Status Coming Soon - December 12, 2019 Coming Soon - May 2020 Rumored
Price Rs. 23,999 ($0.00) [Similarly Priced] - -
Colors Prism Crush White, Black, Pink, Blue Tropical Green, Glacier White, Interstellar Gray Black, White, Blue
Form Factor Candybar Candybar Candybar
Dimension 158.4 x 73.7 x 7.9 mm
(6.24 x 2.9 x 0.31 in)
165.8 x 76.7 x 8.8 mm
(6.53 x 3.02 x 0.35 in)
8.9 mm thickness
(0.35 in thickness)
Weight 172 g (6.07 oz) 209 g (7.37 oz) 191 g (6.74 oz)
SIM Type Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) 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 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)
3G Network HSDPA 850 / 900 / 1900 / 2100
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G Network LTE (unspecified) 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41 LTE
Messaging
Build Features - Fingerprint Sensor(In-display)
- Fingerprint Sensor (side-mounted)
- Fingerprint Sensor

hardware Hardware and OS

OS Android 9.0 (Pie) Android 10 Android 10.0
User Interface One UI MIUI 11 One UI 2.0
Processor Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm) Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver), Qualcomm SM7125 Snapdragon 720G (8 nm) Octa-core 2.0 GHz, Exynos 850
GPU Mali-G72 MP3 Adreno 618 -
RAM 8 GB 6 GB 3 GB
Internal Memory 128 GB 128 GB 64 GB
External Memory microSD, up to 512 GB (dedicated slot) microSDXC (dedicated slot) microSDXC

display Display

Type Full HD+ Infinity-O Super AMOLED Capacitive Touchscreen IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 5 PLS TFT Capacitive Touchscreen
Colors 16M colors 16M colors 16M colors
Size 6.5 inches 6.67 inches 6.55 inches
Resolution 1080 x 2340 pixels (396 ppi) 1080 x 2400 pixels (395 ppi) 720 x 1600 pixels (268 ppi)
Screen-to-Body Ratio 89.06% 84.28% -
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes yes
Radio FM radio - -
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes yes yes

camera Camera

Rear Camera 48 MP + 12 MP + 5 MP + 5 MP 64 MP + 8 MP + 5 MP + 2 MP 48 MP + 8 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
64 MP, f/1.9, 26mm (wide), 1/1.72", 0.8µm, PDAF
8 MP, f/2.2, 119° (ultrawide), 1/4.0", 1.12µm
5 MP, f/2.4, (macro), 1/5.0", 1.12µm, AF
2 MP, f/2.4, (depth)
HDR, panorama
48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF
8 MP, f/2.4, (ultrawide), 1/4.0", 1.12µm
2 MP, f/2.4, (macro)
Panorama, HDR
Video 2160p@30fps, 1080p@30fps 2160p@30fps, 1080p@30/60/120fps, 720p@960fps 1080p@30fps
Front Camera 32 MP, f/2.0, 25mm (wide)
HDR
1080p@30fps [Similar]
16 MP, f/2.0, 26mm (wide), 1/3.1", 1.0µm
HDR
1080p@30fps [Similar]
13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm
HDR, Panorama
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 HSPA 42.2/5.76 Mbps, LTE-A
Bluetooth 5.0, A2DP, LE 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 2.0, Type-C 1.0 reversible connector, USB On-The-Go 2.0, Type-C 1.0 reversible connector Yes
GPS Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS
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 128 GB, 6 GB RAM or 64 GB, 4 GB RAM (UFS 2.1) 64 GB, 3 GB RAM or 32 GB, 3 GB RAM
Expandable Storage microSD, up to 512 GB (dedicated slot) microSDXC (dedicated 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 not present
Gyroscope Sensor gyroscope sensor present gyroscope sensor present gyroscope sensor not present
NFC NFC not supported NFC supported NFC supported

battery Battery

Type Non-removable Li-Po Battery
Fast battery charging 15W
Non-removable Li-Po Battery
Fast battery charging 30W
Non-removable Li-Po Battery
Battery Charging 10W
Capacity 4000 mAh 5020 mAh 5000 mAh
Stand by - - -
Talk Time - - -