Vivo X21 UD vs Xolo Black 1X comparison

Show Only Differences Highlight Differences	Vivo X21 UD	Xolo Black 1X
key specs
Display	6.28-inch	5.00-inch
Processor	Qualcomm Snapdragon 660	MediaTek MT6753
Front Camera	12-megapixel	5-megapixel
Rear Camera	12-megapixel	13-megapixel
RAM	6GB	3GB
Storage	128GB	32GB
Battery Capacity	3200mAh	2400mAh
OS	Android 8.1	Android 5.1
Resolution	1080x2280 pixels	1080x1920 pixels
general
Brand	Vivo	Xolo
Model	X21 UD	Black 1X
Release date	March 1, 2018	October 1, 2015
Form factor	Touchscreen	Touchscreen
Dimensions (mm)	154.50 x 74.80 x 7.40	144.60 x 72.00 x 7.60
Weight (g)	156.20	125.00
Battery capacity (mAh)	3200	2400
Colours	Ruby Red, Aurora White, Black	-
Removable battery	-	No
display
Screen size (inches)	6.28	5.00
Touchscreen	Yes	Yes
Resolution	1080x2280 pixels	1080x1920 pixels
Pixels per inch (PPI)	-	441
hardware
Processor	octa-core	1.3GHz octa-core
Processor make	Qualcomm Snapdragon 660	MediaTek MT6753
RAM	6GB	3GB
Internal storage	128GB	32GB
Expandable storage	-	Yes
Expandable storage type	-	microSD
Expandable storage up to (GB)	-	128
camera
Rear camera	12-megapixel	13-megapixel
Rear flash	LED	Yes
Front camera	12-megapixel	5-megapixel
Front flash	-	Yes
software
Operating system	Android 8.1	Android 5.1
Skin	FunTouch 4.0	HIVE Atlas
connectivity
Wi-Fi	Yes	Yes
Wi-Fi standards supported	802.11 a/b/g/n/ac	802.11 b/g/n
GPS	Yes	Yes
Bluetooth	Yes, v 5.00	Yes
USB OTG	Yes	Yes
Headphones	3.5mm	3.5mm
Number of SIMs	2	2
NFC	-	No
Infrared	-	No
FM	-	Yes
Wi-Fi Direct	-	No
Mobile High-Definition Link (MHL)	-	No
sim 1
SIM Type	Micro-SIM	Nano-SIM
GSM/CDMA	GSM	GSM
3G	Yes	Yes
4G/ LTE	Yes	Yes
sim 2
SIM Type	Micro-SIM	Nano-SIM
GSM/CDMA	GSM	GSM
3G	Yes	Yes
4G/ LTE	Yes	No
sensors
Compass/ Magnetometer	Yes	Yes
Proximity sensor	Yes	Yes
Ambient light sensor	Yes	Yes
Gyroscope	Yes	Yes
Accelerometer	-	No
Barometer	-	No
Temperature sensor	-	No

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