Realme C21y 64gb vs Xiaomi Redmi 9a

Key Specs

Battery
Battery	5000 mAh	5000 mAh
Display
Display	6.5 inches (16.51 cm)	6.53 inches (16.59 cm)
Front Camera
Front Camera	5 MP	5 MP
Processor
Processor	Unisoc T610	MediaTek Helio G25
RAM
RAM	4 GB	2 GB
Rear Camera
Rear Camera	13 MP + 2 MP + 2 MP	13 MP

Battery

Capacity
Capacity	5000 mAh	5000 mAh
Removable
Removable	No	No
Type
Type	Li-ion	Li-Polymer
USB Type-C
USB Type-C	No	No

Design

Build Material
Build Material	-	Back: Plastic
Colours
Colours	Cross Blue, Cross Black	Midnight Black, Sea Blue, Nature Green
Height
Height	164.5 mm	164.9 mm
Thickness
Thickness	9.1 mm	9 mm
Waterproof
Waterproof	-	Yes, Splash proof
Weight
Weight	200 grams Below	194 grams Below
Width
Width	76 mm	77 mm

Display

Aspect Ratio
Aspect Ratio	20:9	20:9
Bezel-less display
Bezel-less display	Yes with waterdrop notch	Yes with waterdrop notch
Brightness
Brightness	420 nits	400 nits
Display Type
Display Type	IPS LCD	IPS LCD
Pixel Density
Pixel Density	270 ppi	269 ppi
Refresh Rate
Refresh Rate	60 Hz	-
Resolution
Resolution	720x1600 px (HD+)	720x1600 px (HD+)
Screen Size
Screen Size	6.5 inches (16.51 cm)	6.53 inches (16.59 cm)
Screen to Body Ratio (calculated)
Screen to Body Ratio (calculated)	81.59 %	81.08 %
Screen to Body Ratio (claimed by the brand)
Screen to Body Ratio (claimed by the brand)	88.7 %	-
Touch Screen
Touch Screen	Yes, Capacitive Touchscreen, Multi-touch	Yes, Capacitive Touchscreen, Multi-touch

Front Camera

Camera Features
Camera Features	Fixed Focus	-
Camera Setup
Camera Setup	Single	-
Resolution
Resolution	5 MP f/2.2, Wide Angle, Primary Camera(5.0" sensor size, 1.12µm pixel size)	5 MP f/2.2, Wide Angle, Primary Camera(1.12µm pixel size)
Sensor
Sensor	CMOS	-
Video Recording
Video Recording	1280x720 @ 30 fps	-

Not sure which
mobile to buy?

General

Brand
Brand	realme	Xiaomi
Custom UI
Custom UI	Realme UI	MIUI
Launch Date
Launch Date	August 30, 2021 (Official)	September 4, 2020 (Official)
Operating System
Operating System	Android v11	Android v10 (Q)

Main Camera

Autofocus
Autofocus	Yes, Phase Detection autofocus	Yes
Camera Features
Camera Features	4 x Digital Zoom Auto Flash Face detection Touch to focus	Digital Zoom Auto Flash Face detection Touch to focus
Camera Setup
Camera Setup	Triple	Single
Flash
Flash	Yes, LED Flash	Yes, LED Flash
Image Resolution
Image Resolution	4128 x 3096 Pixels	4128 x 3096 Pixels
Resolution
Resolution	13 MP f/2.2, Wide Angle (80° field-of-view), Primary Camera(25.5 mm focal length, 3" sensor size, 1.12µm pixel size)2 MP f/2.4, Macro Camera(21.8 mm focal length, 5.0" sensor size, 1.75µm pixel size)2 MP f/2.4(21.8 mm focal length, 5.0" sensor size, 1.75µm pixel size)	13 MP f/2.2, Wide Angle, Primary Camera(28 mm focal length, 1µm pixel size)
Sensor
Sensor	CMOS image sensor	-
Settings
Settings	Exposure compensation, ISO control	Exposure compensation, ISO control
Shooting Modes
Shooting Modes	Continuous Shooting High Dynamic Range mode (HDR)	Continuous Shooting High Dynamic Range mode (HDR)
Video Recording
Video Recording	1920x1080 @ 30 fps	1920x1080 @ 30 fps

Multimedia

Audio Jack
Audio Jack	3.5 mm	3.5 mm
Loudspeaker
Loudspeaker	Yes	Yes

Network & Connectivity

Bluetooth
Bluetooth	Yes, v5.0	Yes, v5.0
GPS
GPS	Yes with A-GPS, Glonass	Yes with A-GPS, Glonass
NFC
NFC	No	No
Network Support
Network Support	5G Not Supported in India, 4G Supported in India, 3G, 2G	5G Not Supported in India, 4G Supported in India, 3G, 2G
SAR Value
SAR Value	Head: 0.855 W/kg, Body: 0.674 W/kg	Head: 0.528 W/kg, Body: 0.791 W/kg
SIM 1
SIM 1	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 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available	4G Bands: TD-LTE 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 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available
SIM 2
SIM 2	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 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available	4G Bands: TD-LTE 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 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available
SIM Size
SIM Size	SIM1: Nano, SIM2: Nano	SIM1: Nano, SIM2: Nano
SIM Slot(s)
SIM Slot(s)	Dual SIM, GSM+GSM	Dual SIM, GSM+GSM
USB Connectivity
USB Connectivity	Mass storage device, USB charging, microUSB 2.0	Mass storage device, USB charging, microUSB 2.0
VoLTE
VoLTE	Yes	Yes
Wi-Fi
Wi-Fi	Yes, Wi-Fi 4 (802.11 b/g/n)	Yes, Wi-Fi 4 (802.11 a/b/g/n)
Wi-Fi Calling
Wi-Fi Calling	-	Yes
Wi-Fi Features
Wi-Fi Features	Mobile Hotspot	Mobile Hotspot

Performance

Architecture
Architecture	-	64 bit
CPU
CPU	Octa core (1.8 GHz, Dual core, Cortex A75 + 1.8 GHz, Hexa Core, Cortex A55)	Octa core (2 GHz, Quad core, Cortex A53 + 1.5 GHz, Quad core, Cortex A53)
Chipset
Chipset	Unisoc T610	MediaTek Helio G25
Fabrication
Fabrication	12 nm	12 nm
Graphics
Graphics	Mali-G52	PowerVR GE8320
RAM type
RAM Type	LPDDR4X	LPDDR4X

Sensors

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

Storage

Expandable Memory
Expandable Memory	Yes, Up to 256 GB	Yes, Up to 512 GB
Internal Memory
Internal Memory	64 GB	32 GB
Storage Type
Storage Type	eMMC 5.1	eMMC 5.1
USB OTG
USB OTG	Yes	Yes