Samsung Galaxy M20 vs Redmi 6 vs Samsung Galaxy A30 vs Samsung Galaxy A40 comparison

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ratings
Overall NDTV RatingRead ReviewRead ReviewRead Review-
Design Rating-
Display Rating-
Software Rating-
Performance Rating-
Battery Life Rating-
Camera Rating-
Value for Money Rating-
key specs
Display6.30-inch5.45-inch6.40-inch5.90-inch
Processor1.6GHz octa-core 2GHz octa-core -1.8GHz octa-core
Front Camera8-megapixel 5-megapixel 16-megapixel 25-megapixel
Resolution1080x2340 pixels720x1440 pixels1080x2340 pixels1080x2280 pixels
RAM3GB3GB4GB4GB
OSAndroid 8.1 OreoAndroid 8.1 OreoAndroid PieAndroid 9.0 Pie
Storage32GB32GB64GB64GB
Rear Camera13-megapixel + 5-megapixel 12-megapixel + 5-megapixel16-megapixel + 5-megapixel 16-megapixel
Battery Capacity5000mAh3000mAh4000mAh3100mAh
general
Release dateJanuary 2019June 2018February 2019March 2019
Launched in IndiaYesYesYes-
Form factorTouchscreenTouchscreenTouchscreenTouchscreen
Battery capacity (mAh)5000300040003100
Removable batteryNoNo--
Wireless chargingNoNo--
ColoursCharcoal Black, Ocean BlueLake Blue, Gold, Rose Gold, BlackRed, Blue, BlackBlue, Black, Orange, White
Body type-Plastic--
Dimensions (mm)-147.50 x 71.50 x 8.30158.50 x 74.70 x 7.70144.30 x 69.10 x 7.90
Weight (g)-146.00--
Fast charging--Proprietary-
display
Screen size (inches)6.305.456.405.90
TouchscreenYesYesYesYes
Resolution1080x2340 pixels720x1440 pixels1080x2340 pixels1080x2280 pixels
Aspect ratio19.5:918:9-19:9
Pixels per inch (PPI)-295--
hardware
Processor1.6GHz octa-core (2x1.8GHz + 6x1.6GHz)2GHz octa-core (8x2GHz)-1.8GHz octa-core
Processor makeSamsung Exynos 7904MediaTek Helio P22Exynos 7904Samsung Exynos 7885
RAM3GB3GB4GB4GB
Internal storage32GB32GB64GB64GB
Expandable storageYesYesYesYes
Expandable storage typemicroSDmicroSDmicroSDmicroSD
Expandable storage up to (GB)512256512-
Dedicated microSD slotYesYesYes-
camera
Rear camera13-megapixel (f/1.9) + 5-megapixel (f/2.2)12-megapixel (f/2.2, 1.25-micron) + 5-megapixel16-megapixel (f/1.7) + 5-megapixel (f/2.2)16-megapixel (f/2.0)
Rear autofocusYesPhase detection autofocusYesYes
Rear flashYesLEDYesYes
Front camera8-megapixel (f/2.0)5-megapixel (f/2.2, 1.12-micron)16-megapixel (f/2.0)25-megapixel
Front flashNoNo--
software
Operating systemAndroid 8.1 OreoAndroid 8.1 OreoAndroid PieAndroid 9.0 Pie
SkinSamsung Experience 9.5 UXMIUI 9.6One UIOne UI
connectivity
Wi-Fi standards supported802.11 b/g/n802.11 b/g/n--
GPSYesYesYesYes
BluetoothYesYes, v 4.20YesYes, v 4.20
USB Type-CYesNoYesYes
Micro-USBNoYes--
Headphones3.5mm3.5mm3.5mm3.5mm
Number of SIMs2222
Wi-Fi-YesYesYes
NFC-No-Yes
Infrared-No--
USB OTG-Yes--
FM-Yes--
Active 4G on both SIM cards-Yes--
sim 1
SIM TypeNano-SIMNano-SIMNano-SIMNano-SIM
GSM/CDMAGSMGSMGSMGSM
3GYesYesYesYes
4G/ LTEYesYesYesYes
sim 2
SIM TypeNano-SIMNano-SIMNano-SIMNano-SIM
GSM/CDMAGSMGSMGSMGSM
3GYesYesYesYes
4G/ LTEYesYesYesYes
sensors
Face unlockYesYes-Yes
Fingerprint sensorYesYesYesYes
Proximity sensorYesYesYesYes
AccelerometerYesYesYesYes
3D face recognition-No--
Compass/ Magnetometer-Yes-Yes
Ambient light sensor-Yes-Yes
Gyroscope-No-Yes