Karbonn Aura Note 4g vs Karbonn X21

Key Specs

Battery
2800 mAh	3000 mAh
Display
5.5 inches (13.97 cm)	5.45 inches (13.84 cm)
Front Camera
5 MP	5 MP
Processor
MediaTek MT6737	Unisoc SC9863
RAM
2 GB	2 GB
Rear Camera
5 MP	8 MP

Battery

Capacity
2800 mAh	3000 mAh
Removable
Yes	Yes
Standby time
Up to 350 Hours(2G)	-
TalkTime
Up to 4 Hours(4G) / Up to 8 Hours(2G)	-
Type
Li-ion	Li-ion
USB Type-C
No	No

Design

Colours
Black, Champagne	Midnight Blue, Aqua Green
Height
154.2 mm	147.5 mm
Thickness
10.5 mm Below	9.3 mm
Weight
174 grams	160 grams
Width
79.8 mm	71.8 mm

Display

Aspect Ratio
-	18:9
Bezel-less display
-	Yes
Display Type
IPS LCD	IPS LCD
Pixel Density
267 ppi	295 ppi
Resolution
720x1280 px (HD)	720x1440 px (HD+)
Screen Size
5.5 inches (13.97 cm)	5.45 inches (13.84 cm)
Screen to Body Ratio (calculated)
67.61 %	72.38 %
Touch Screen
Yes, Capacitive Touchscreen, Multi-touch	Yes, Capacitive Touchscreen, Multi-touch

Front Camera

Resolution
-	5 MP, Primary Camera

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General

Brand
Karbonn	Karbonn
Custom UI
-	Android Go
Launch Date
February 25, 2017 (Official)	June 15, 2021 (Official)
Operating System
Android v6.0 (Marshmallow)	Android v10

Main Camera

Autofocus
Yes	-
Camera Features
Digital Zoom Smile detection	Digital Zoom
Camera Setup
Single	Single
Flash
Yes, LED Flash	Yes, LED Flash
Image Resolution
2592 x 1944 Pixels	3264 x 2448 Pixels
OIS
-	No
Resolution
5 MP, Primary Camera	8 MP, Primary Camera
Shooting Modes
-	Burst mode

Multimedia

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

Network & Connectivity

Bluetooth
Yes, v4.0	Yes, v4.2
GPS
Yes with A-GPS	Yes with A-GPS
NFC
No	No
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
-	Head: 0.807 W/kg, Body: 1.152 W/kg
SIM 1
4G Bands: TD-LTE 2300(band 40) FD-LTE 1800(band 3) / 850(band 5) 3G Bands: UMTS 2100 / 900 MHz 2G Bands: GSM 1800 / 900 MHz GPRS: Available EDGE: Available	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
SIM 2
2G Bands: GSM 1800 / 900 MHz	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
SIM Size
-	SIM1: Nano, SIM2: Nano
SIM Slot(s)
Dual SIM, GSM+GSM	Dual SIM, GSM+GSM
USB Connectivity
microUSB 2.0	Mass storage device, USB charging, microUSB 2.0
VoLTE
Yes	Yes
Wi-Fi
Yes, Wi-Fi 4 (802.11 b/g/n)	Yes, Wi-Fi 4 (802.11 a/b/g/n)
Wi-Fi Features
Mobile Hotspot	Mobile Hotspot

Performance

Architecture
-	64 bit
CPU
Quad core, 1.25 GHz, Cortex A53	Octa core, 1.6 GHz, Cortex A55
Chipset
MediaTek MT6737	Unisoc SC9863
Graphics
Mali-T720 MP2	PowerVR GE8322

Sensors

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

Storage

Expandable Memory
Yes, Up to 32 GB	Yes, Up to 256 GB
Internal Memory
16 GB	32 GB