Xiaomi Redmi K20 vs Vivo X21 (128GB) comparison

Show Only Differences Highlight Differences	Xiaomi Redmi K20 (64GB)	Vivo X21 (128GB)
ratings
Overall NDTV Rating	Read Review	Read Review
Design Rating
Display Rating
Software Rating
Performance Rating
Battery Life Rating
Camera Rating
Value for Money Rating
key specs
Display	6.39-inch	6.28-inch
Processor	Qualcomm Snapdragon 730	Qualcomm Snapdragon 660
Front Camera	20-megapixel	12-megapixel
Rear Camera	48-megapixel + 8-megapixel + 13-megapixel	12-megapixel + 5-megapixel
RAM	6GB	6GB
Storage	64GB	128GB
Battery Capacity	4000mAh	3200mAh
OS	Android Pie	Android 8.1
Resolution	1080x2340 pixels	1080x2280 pixels
general
Brand	Xiaomi	Vivo
Model	Redmi K20	X21
Release date	May 28, 2019	March 1, 2018
Launched in India	Yes	Yes
Form factor	Touchscreen	Touchscreen
Body type	Glass	-
Dimensions (mm)	156.70 x 74.30 x 8.80	154.50 x 74.80 x 7.40
Weight (g)	191.00	156.20
Battery capacity (mAh)	4000	3200
Fast charging	Proprietary	Proprietary
Colours	Carbon Black, Glacier Blue, Flame Red	Black, Red
Removable battery	-	No
display
Screen size (inches)	6.39	6.28
Touchscreen	Yes	Yes
Resolution	1080x2340 pixels	1080x2280 pixels
Protection type	Gorilla Glass	-
Aspect ratio	19.5:9	19:9
Pixels per inch (PPI)	403	-
hardware
Processor	1.8GHz octa-core (6x1.8GHz + 2x2.2GHz)	2.2GHz octa-core
Processor make	Qualcomm Snapdragon 730	Qualcomm Snapdragon 660
RAM	6GB	6GB
Internal storage	64GB	128GB
Expandable storage	No	Yes
Dedicated microSD slot	No	-
Expandable storage type	-	microSD
Expandable storage up to (GB)	-	256
camera
Rear camera	48-megapixel (f/1.75, 1.6-micron) + 8-megapixel (f/2.4, 1.12-micron) + 13-megapixel (f/2.4, 1.12-micron)	12-megapixel (f/1.8, 1.4-micron) + 5-megapixel (f/2.4)
Rear autofocus	Yes	Phase detection autofocus
Rear flash	Yes	LED
Front camera	20-megapixel (f/2.2, 0.8-micron)	12-megapixel (f/2.0)
Pop-Up Camera	Yes	-
Front flash	No	-
software
Operating system	Android Pie	Android 8.1
Skin	MIUI 10	FunTouch 4.0
connectivity
Wi-Fi	Yes	Yes
Wi-Fi standards supported	802.11 a/b/g/n/ac	802.11 a/b/g/n/ac
GPS	Yes	Yes
Bluetooth	Yes, v 5.00	Yes, v 5.00
NFC	No	No
Infrared	Yes	No
USB Type-C	Yes	-
Headphones	3.5mm	3.5mm
Number of SIMs	2	2
Wi-Fi Direct	Yes	-
Active 4G on both SIM cards	Yes	-
USB OTG	-	Yes
Micro-USB	-	Yes
FM	-	No
sim 1
SIM Type	Nano-SIM	Nano-SIM
GSM/CDMA	GSM	GSM
3G	Yes	Yes
4G/ LTE	Yes	Yes
sim 2
SIM Type	Nano-SIM	Nano-SIM
GSM/CDMA	GSM	GSM
3G	Yes	Yes
4G/ LTE	Yes	Yes
sensors
Face unlock	Yes	-
Fingerprint sensor	Yes	Yes
Compass/ Magnetometer	Yes	Yes
Proximity sensor	Yes	Yes
Accelerometer	Yes	Yes
Ambient light sensor	Yes	Yes
Gyroscope	Yes	Yes

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