Phone Comparison - Samsung Galaxy A40 vs Samsung Galaxy A21s vs Samsung Galaxy A51 5G UW

general General Info

Manufacturer Samsung Samsung Samsung
Announced March 2019 Expected Announcement - May 2020 August 2020
Status Coming Soon - April 2019 Rumored Available - August 2020
Colors Black, White, Blue, Coral Black, White, Blue Prism Bricks Blue
Form Factor Candybar Candybar Candybar
Dimension 144.3 x 69.1 x 7.9 mm
(5.68 x 2.72 x 0.31 in)
8.9 mm thickness
(0.35 in thickness)
158.8 x 73.4 x 8.6 mm
(6.25 x 2.89 x 0.34 in)
Weight - 191 g (6.74 oz) 188.8 g (6.63.0.28 oz)
SIM Type Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) Pre-installed Nano-SIM
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
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G Network LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300), 41(2500) LTE 2, 4, 5, 13, 66
5G Network - - 260, 261 mmWave
SAR EU - W/kg (head)
- W/kg (body)
- W/kg (head)
- W/kg (body)
0.59 W/kg (head)
1.32 W/kg (body)
Messaging
Build Features - Fingerprint Sensor
- Fingerprint Sensor
- Fingerprint Sensor (under display, optical)

hardware Hardware and OS

OS Android 9.0 (Pie) Android 10.0 Android 10
User Interface - One UI 2.0 One UI 2.0
Processor Octa-core (2x1.8 GHz Cortex-A73 & 6x1.6 GHz Cortex-A53), Exynos 7885 Octa (14 nm) Octa-core 2.0 GHz, Exynos 850 Octa-core (1x2.4 GHz Kryo 475 Prime & 1x2.2 GHz Kryo 475 Gold & 6x1.8 GHz Kryo 475 Silver), Qualcomm SDM765 Snapdragon 765G (7 nm)
GPU Mali-G71 - Adreno 620
RAM 4 GB 3 GB 6 GB
Internal Memory 64 GB 64 GB 128 GB
External Memory microSD, up to 512 GB (dedicated slot) microSDXC microSDXC (uses shared SIM slot)

display Display

Type Super AMOLED Capacitive Touchscreen PLS TFT Capacitive Touchscreen Super AMOLED Capacitive Touchscreen
Corning Gorilla Glass 3
Colors 16M colors 16M colors 16M colors
Size 5.9 inches 6.55 inches 6.5 inches
Resolution 1080 x 2280 pixels (428 ppi) 720 x 1600 pixels (268 ppi) 1080 x 2400 pixels (405 ppi)
Screen-to-Body Ratio 86.97% - 87.47%
Multi-Touch yes yes yes

multimedia Multimedia

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

camera Camera

Rear Camera 16 MP + 5 MP 48 MP + 8 MP + 2 MP 48 MP + 12 MP + 5 MP + 5 MP
Flash LED Flash LED Flash LED flash
Features 16 MP, f/2.0, PDAF
5 MP, f/2.2, 12mm, (ultrawide)
Panorama, HDR
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
48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF
12 MP, f/2.2, 123˚ (ultrawide)
5 MP, f/2.4, (macro)
5 MP, f/2.2, (depth)
panorama, HDR
Video 2160p@30fps, 1080p@30fps 1080p@30fps 4K@30fps, 1080p@30/120fps; gyro-EIS
Front Camera 25 MP, 1080p@30fps [Similar] 13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm
HDR, Panorama
1080p@30fps [Similar]
32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm
HDR
1080p@30fps [Similar]

connectivity Connectivity and Data Rate

GPRS Yes Yes Yes
Edge Yes Yes Yes
3G HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat12 600/150 Mbps HSPA 42.2/5.76 Mbps, LTE-A HSPA 42.2/5.76 Mbps, LTE-A, 5G
Bluetooth 4.2, A2DP, LE 5.0, A2DP, LE 5.0, A2DP, LE
Wi-Fi Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
USB Type-C 1.0 reversible connector Yes 2.0, Type-C 1.0 reversible connector, USB On-The-Go
GPS Yes, with A-GPS, GLONASS, BDS Yes, with A-GPS Yes, with A-GPS, GLONASS, GALILEO, BDS
Browser Yes Yes Yes

memory User Memory

Internal 64 GB, 4 GB RAM 64 GB, 3 GB RAM or 32 GB, 3 GB RAM 128 GB, 6 GB RAM
Expandable Storage microSD, up to 512 GB (dedicated slot) microSDXC microSDXC (uses shared SIM 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 not present magnetic field sensor present
Gyroscope Sensor gyroscope sensor present gyroscope sensor not present gyroscope sensor present
NFC NFC supported NFC supported NFC supported

battery Battery

Type Non-removable Li-Po Battery Non-removable Li-Po Battery
Battery Charging 10W
Non-removable Li-Po Battery
Fast battery charging 15W
Capacity 3100 mAh 5000 mAh 4500 mAh
Stand by - - -
Talk Time - - -