I Kall Z7 vs Vivo Y21

Key Specs

Battery
Battery	4000 mAh	1900 mAh
Display
Display	6.26 inches (15.9 cm)	4.5 inches (11.43 cm)
Front Camera
Front Camera	8 MP	2 MP
Processor
Processor	-	MediaTek MT6580
RAM
RAM	3 GB	1 GB
Rear Camera
Rear Camera	13 MP	5 MP

Battery

Capacity
Capacity	4000 mAh	1900 mAh
Removable
Removable	No	Yes
Type
Type	Li-ion	Li-ion
USB Type-C
USB Type-C	No	No

Design

Colours
Colours	Blue	Gold, White
Height
Height	-	130.7 mm
Thickness
Thickness	-	9.2 mm
Weight
Weight	-	145 grams
Width
Width	-	66.4 mm

Display

Bezel-less display
Bezel-less display	Yes with notch	-
Display Type
Display Type	IPS LCD	IPS LCD
Pixel Density
Pixel Density	269 ppi	218 ppi
Resolution
Resolution	720x1520 px (HD+)	480x854 px
Screen Protection
Screen Protection	-	No
Screen Size
Screen Size	6.26 inches (15.9 cm)	4.5 inches (11.43 cm)
Screen to Body Ratio (calculated)
Screen to Body Ratio (calculated)	-	64.18 %
Touch Screen
Touch Screen	Yes, Capacitive Touchscreen, Multi-touch	Yes, Capacitive Touchscreen, Multi-touch

Front Camera

Autofocus
Autofocus	-	No
Flash
Flash	-	No
Resolution
Resolution	8 MP, Primary Camera	2 MP f/2.2, Primary Camera
Video Recording
Video Recording	1920x1080 fps	-

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General

Brand
Brand	I Kall	vivo
Launch Date
Launch Date	December 14, 2021 (Official)	May 16, 2016 (Official)
Operating System
Operating System	Android v10 (Q)	Android v5.1 (Lollipop)

Main Camera

Autofocus
Autofocus	Yes	Yes
Camera Features
Camera Features	Digital Zoom Auto Flash	Digital Zoom
Camera Setup
Camera Setup	Single	Single
Flash
Flash	Yes, LED Flash	Yes, LED Flash
Image Resolution
Image Resolution	4128 x 3096 Pixels	2592 x 1944 Pixels
OIS
OIS	-	No
Resolution
Resolution	13 MP, Primary Camera	5 MP f/2.2, Primary Camera
Video Recording
Video Recording	-	1280x720 @ 30 fps

Multimedia

Audio Jack
Audio Jack	3.5 mm	3.5 mm
FM Radio
FM Radio	-	Yes
Loudspeaker
Loudspeaker	Yes	Yes

Network & Connectivity

Bluetooth
Bluetooth	Yes	Yes, v4.0
GPS
GPS	Yes with A-GPS	Yes with A-GPS
NFC
NFC	-	No
Network Support
Network Support	5G Not Supported in India, 4G Supported in India, 3G, 2G	5G Not Supported in India, 3G, 2G
SIM 1
SIM 1	4G Bands: TD-LTE 2300(band 40) FD-LTE 1800(band 3) 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available	3G Bands: UMTS 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available
SIM 2
SIM 2	4G Bands: TD-LTE 2300(band 40) FD-LTE 1800(band 3) 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available	2G Bands: GSM 1800 / 1900 / 850 / 900 MHz
SIM Size
SIM Size	-	SIM1: Micro, SIM2: Micro
SIM Slot(s)
SIM Slot(s)	Dual SIM, GSM+GSM	Dual SIM, GSM+GSM
USB Connectivity
USB Connectivity	Mass storage device, USB charging, microUSB	Mass storage device, USB charging, microUSB 2.0
VoLTE
VoLTE	Yes	-
Wi-Fi
Wi-Fi	Yes, Wi-Fi 4 (802.11 b/g/n)	Yes, Wi-Fi 4 (802.11 b/g/n)
Wi-Fi Features
Wi-Fi Features	Mobile Hotspot	Mobile Hotspot

Performance

Architecture
Architecture	-	32 bit
CPU
CPU	Quad core, 1.3 GHz	Quad core, 1.3 GHz, Cortex A7
Chipset
Chipset	-	MediaTek MT6580
Graphics
Graphics	-	Mali-400 MP

Sensors

Fingerprint Sensor
Fingerprint Sensor	Yes	No
Fingerprint Sensor Position
Fingerprint Sensor Position	Rear	-
Other Sensors
Other Sensors	Light sensor, Proximity sensor, Accelerometer	Proximity sensor, Accelerometer, Compass

Storage

Expandable Memory
Expandable Memory	Yes, Up to 128 GB	Yes, Up to 128 GB
Internal Memory
Internal Memory	32 GB	16 GB
USB OTG
USB OTG	-	Yes