Samsung Galaxy S9 vs Mi A1 vs Xiaomi Redmi Note 4 comparison

Show Only Differences Highlight Differences	Samsung Galaxy S9	Mi A1	Xiaomi Redmi Note 4
ratings
Overall NDTV Rating	Read Review	Read Review	Read Review
Design Rating
Display Rating
Software Rating
Performance Rating
Battery Life Rating
Camera Rating
Value for Money Rating
key specs
Display	5.80-inch	5.50-inch	5.50-inch
Processor	Samsung Exynos 9810	Qualcomm Snapdragon 625	Qualcomm Snapdragon 625
Front Camera	8-megapixel	5-megapixel	5-megapixel
Rear Camera	12-megapixel	12-megapixel	13-megapixel
RAM	4GB	4GB	4GB
Storage	64GB	64GB	64GB
Battery Capacity	3000mAh	3080mAh	4100mAh
OS	Android 8.0	Android 7.1.2	Android 6.0
Resolution	1440x2960 pixels	1080x1920 pixels	1080x1920 pixels
general
Brand	Samsung	Xiaomi	Xiaomi
Model	Galaxy S9	Mi A1	Redmi Note 4
Release date	March 1, 2018	September 1, 2017	August 1, 2016
Launched in India	Yes	Yes	Yes
Form factor	Touchscreen	Touchscreen	Touchscreen
Dimensions (mm)	147.70 x 68.70 x 8.50	155.40 x 75.80 x 7.30	151.00 x 76.00 x 8.30
Weight (g)	163.00	165.00	175.00
Battery capacity (mAh)	3000	3080	4100
Removable battery	No	No	No
Fast charging	Quick Charge 2.0	-	-
Wireless charging	Yes	-	-
Colours	Lilac Purple, Midnight Black, Coral Blue	Rose Gold, Gold, Black	Gold, Grey, Matte Black
display
Screen size (inches)	5.80	5.50	5.50
Touchscreen	Yes	Yes	Yes
Resolution	1440x2960 pixels	1080x1920 pixels	1080x1920 pixels
Protection type	Gorilla Glass	-	-
Aspect ratio	18.5:9	16:9	16:9
Pixels per inch (PPI)	568	-	401
hardware
Processor	octa-core (4x2.7GHz + 4x1.7GHz)	2GHz octa-core	2GHz octa-core
Processor make	Samsung Exynos 9810	Qualcomm Snapdragon 625	Qualcomm Snapdragon 625
RAM	4GB	4GB	4GB
Internal storage	64GB	64GB	64GB
Expandable storage	Yes	Yes	Yes
Expandable storage type	microSD	microSD	microSD
Expandable storage up to (GB)	400	128	128
camera
Rear camera	12-megapixel (1.4-micron)	12-megapixel	13-megapixel (f/2.0, 1.12-micron)
Rear autofocus	Phase detection autofocus	-	Phase detection autofocus
Rear flash	LED	Dual LED	Dual LED
Front camera	8-megapixel (f/1.7, 1.22-micron)	5-megapixel	5-megapixel (f/2.0)
Front autofocus	Yes	-	-
Front flash	No	-	-
software
Operating system	Android 8.0	Android 7.1.2	Android 6.0
Skin	Experience 9.0	-	MIUI 8
connectivity
Wi-Fi	Yes	Yes	Yes
Wi-Fi standards supported	802.11 a/b/g/n/ac	802.11 a/b/g/n/ac	802.11 a/b/g/n
GPS	Yes	Yes	Yes
Bluetooth	Yes, v 5.00	Yes, v 4.20	Yes, v 4.10
NFC	Yes	No	No
USB OTG	Yes	Yes	Yes
USB Type-C	Yes	Yes	-
Headphones	3.5mm	3.5mm	3.5mm
FM	No	No	Yes
Number of SIMs	2	2	2
Wi-Fi Direct	Yes	No	No
Infrared	-	Yes	Yes
Mobile High-Definition Link (MHL)	-	No	No
Micro-USB	-	-	Yes
sim 1
SIM Type	Nano-SIM	Nano-SIM	Micro-SIM
GSM/CDMA	GSM	GSM	GSM
3G	Yes	Yes	Yes
4G/ LTE	Yes	Yes	Yes
sim 2
SIM Type	Nano-SIM	Nano-SIM	Nano-SIM
GSM/CDMA	GSM	GSM	GSM
3G	Yes	Yes	Yes
4G/ LTE	Yes	Yes	Yes
sensors
Face unlock	Yes	-	-
Fingerprint sensor	Yes	Yes	Yes
Compass/ Magnetometer	Yes	Yes	Yes
Proximity sensor	Yes	Yes	Yes
Accelerometer	Yes	Yes	Yes
Ambient light sensor	Yes	Yes	Yes
Gyroscope	Yes	Yes	Yes
Barometer	Yes	No	No
Temperature sensor	-	No	No

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