Vivo Y21 vs Vivo Y91i

Key Specs

Battery
1900 mAh	4030 mAh
Display
4.5 inches (11.43 cm)	6.22 inches (15.8 cm)
Front Camera
2 MP	5 MP
Processor
MediaTek MT6580	MediaTek Helio P22
RAM
1 GB	2 GB
Rear Camera
5 MP	13 MP

Battery

Capacity
1900 mAh	4030 mAh
Removable
Yes	No
Type
Li-ion	Li-ion
USB Type-C
No	No

Design

Build Material
-	Back: Plastic
Colours
Gold, White	Red, Fusion Black, Sunset Red, Ocean Blue
Height
130.7 mm	155.1 mm
Thickness
9.2 mm	8.2 mm
Weight
145 grams	163.5 grams
Width
66.4 mm	75 mm

Display

Aspect Ratio
-	19:9
Bezel-less display
-	Yes with waterdrop notch
Display Type
IPS LCD	IPS LCD
Pixel Density
218 ppi	270 ppi
Resolution
480x854 px	720x1520 px (HD+)
Screen Protection
No	-
Screen Size
4.5 inches (11.43 cm)	6.22 inches (15.8 cm)
Screen to Body Ratio (calculated)
64.18 %	82.6 %
Screen to Body Ratio (claimed by the brand)
-	88.6 %
Touch Screen
Yes, Capacitive Touchscreen, Multi-touch	Yes, Capacitive Touchscreen

Front Camera

Autofocus
No	-
Flash
No	-
Resolution
2 MP f/2.2, Primary Camera	5 MP f/1.8, Primary Camera

Not sure which
mobile to buy?

General

Brand
vivo	vivo
Custom UI
-	Funtouch OS
Launch Date
May 16, 2016 (Official)	March 13, 2019 (Official)
Operating System
Android v5.1 (Lollipop)	Android v8.1 (Oreo)

Main Camera

Autofocus
Yes	Yes
Camera Features
Digital Zoom	Digital Zoom Auto Flash Face detection Touch to focus
Camera Setup
Single	Single
Flash
Yes, LED Flash	Yes, LED Flash
Image Resolution
2592 x 1944 Pixels	4128 x 3096 Pixels
OIS
No	-
Resolution
5 MP f/2.2, Primary Camera	13 MP f/2.2, Primary Camera
Settings
-	Exposure compensation, ISO control
Shooting Modes
-	Continuous Shooting High Dynamic Range mode (HDR)
Video Recording
1280x720 @ 30 fps	1920x1080 @ 30 fps

Multimedia

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

Network & Connectivity

Bluetooth
Yes, v4.0	Yes, v5.0
GPS
Yes with A-GPS	Yes with A-GPS, Glonass
NFC
No	No
Network Support
5G Not Supported in India, 3G, 2G	5G Not Supported in India, 4G Supported in India, 3G, 2G
SAR Value
-	Head: 1.283 W/kg, Body: 0.609 W/kg
SIM 1
3G Bands: UMTS 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available	4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 700(band 28) / 850(band 5) 3G Bands: UMTS 1900 / 2100 / 900 MHz 2G Bands: GSM 1800 / 1900 / 900 MHz GPRS: Available EDGE: Available
SIM 2
2G Bands: GSM 1800 / 1900 / 850 / 900 MHz	4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 850(band 5) 3G Bands: UMTS 1900 / 2100 / 900 MHz 2G Bands: GSM 1800 / 1900 / 900 MHz GPRS: Available EDGE: Available
SIM Size
SIM1: Micro, SIM2: Micro	SIM1: Nano, SIM2: Nano
SIM Slot(s)
Dual SIM, GSM+GSM	Dual SIM, GSM+GSM
USB Connectivity
Mass storage device, USB charging, microUSB 2.0	Mass storage device, USB charging, microUSB 2.0
VoLTE
-	Yes
Wi-Fi
Yes, Wi-Fi 4 (802.11 b/g/n)	Yes, Wi-Fi 4 (802.11 b/g/n)
Wi-Fi Features
Mobile Hotspot	Mobile Hotspot

Performance

Architecture
32 bit	64 bit
CPU
Quad core, 1.3 GHz, Cortex A7	Octa core, 2 GHz, Cortex A53
Chipset
MediaTek MT6580	MediaTek Helio P22
Fabrication
-	12 nm
Graphics
Mali-400 MP	PowerVR GE8320
RAM type
-	LPDDR3

Sensors

Fingerprint Sensor
No	No
Other Sensors
Proximity sensor, Accelerometer, Compass	Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope

Storage

Expandable Memory
Yes, Up to 128 GB	Yes, Up to 256 GB
Internal Memory
16 GB	16 GB
Storage Type
-	eMMC 5.1
USB OTG
Yes	Yes