Samsung Galaxy A21 vs Samsung Galaxy Note 4 Duo comparison

Show Only Differences Highlight Differences	Samsung Galaxy A21	Samsung Galaxy Note 4 Duos
key specs
Display	6.50-inch	5.70-inch
Front Camera	13-megapixel	3.7-megapixel
Rear Camera	16-megapixel + 8-megapixel + 2-megapixel + 2-megapixel	16-megapixel
RAM	3GB	3GB
Storage	32GB	16GB
Battery Capacity	4000mAh	3000mAh
OS	Android 10	Android 4.4.2
Processor	-	Qualcomm Snapdragon 805
Resolution	-	1440x2560 pixels
general
Brand	Samsung	Samsung
Model	Galaxy A21	Galaxy Note 4 Duos
Release date	April 8, 2020	October 1, 2014
Form factor	Touchscreen	Touchscreen
Battery capacity (mAh)	4000	3000
Removable battery	No	No
Fast charging	Proprietary	-
Wireless charging	No	-
Colours	Black	-
display
Screen size (inches)	6.50	5.70
Touchscreen	Yes	Yes
Resolution	-	1440x2560 pixels
Pixels per inch (PPI)	-	515
hardware
Processor make	MediaTek Helio P35 (MT6765)	Qualcomm Snapdragon 805
RAM	3GB	3GB
Internal storage	32GB	16GB
Expandable storage	Yes	Yes
Expandable storage type	microSD	microSD
Expandable storage up to (GB)	512	128
Processor	-	2.7GHz quad-core
camera
Rear camera	16-megapixel + 8-megapixel + 2-megapixel + 2-megapixel	16-megapixel
Rear autofocus	Yes	-
Rear flash	Yes	LED
Front camera	13-megapixel	3.7-megapixel
Pop-Up Camera	No	-
software
Operating system	Android 10	Android 4.4.2
connectivity
Wi-Fi	Yes	Yes
GPS	Yes	Yes
Bluetooth	Yes	Yes, v 4.00
Wi-Fi standards supported	-	802.11 a/b/g/n
NFC	-	Yes
Infrared	-	No
USB OTG	-	No
Headphones	-	3.5mm
FM	-	No
Number of SIMs	-	2
Wi-Fi Direct	-	No
Mobile High-Definition Link (MHL)	-	No
sensors
Fingerprint sensor	Yes	-
Compass/ Magnetometer	-	Yes
Proximity sensor	-	Yes
Accelerometer	-	Yes
Ambient light sensor	-	Yes
Gyroscope	-	Yes
Barometer	-	No
Temperature sensor	-	No
sim 1
SIM Type	-	Micro-SIM
GSM/CDMA	-	GSM
3G	-	Yes
4G/ LTE	-	Yes
sim 2
SIM Type	-	Micro-SIM
GSM/CDMA	-	GSM
3G	-	Yes
4G/ LTE	-	Yes

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