Apple iPhone 18 Pro Max vs Karbonn X21

Key Specs

Battery
-	3000 mAh
Display
-	5.45 inches (13.84 cm)
Front Camera
-	5 MP
Processor
-	Unisoc SC9863
RAM
-	2 GB
Rear Camera
-	8 MP

Audio

Audio Jack
Lightning	-
Loudspeaker
Yes	-

Battery

Capacity
5100 mAh	3000 mAh
Quick Charging
Yes, Fast, 80W	-
Removable
-	Yes
Type
Li-Polymer	Li-ion
USB Type-C
No	No
Wireless Charging
Yes	-

Camera

Autofocus
Yes	-
Flash
Yes, Retina Flash	-
Front Camera
18MP	-
Front Camera Physical Aperture
f/1.4 - f/2.4	-
Image Resolution
16300 x 12300 Pixels	-
Rear Camera
48 MP + 48 MP + 48 MP	-
Shooting Modes
Continuous Shooting High Dynamic Range mode (HDR)	-
Video Recording
1920x1080 fps	-

Design

Colours
-	Midnight Blue, Aqua Green
Height
-	147.5 mm
Thickness
-	9.3 mm
Weight
-	160 grams
Width
-	71.8 mm

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Display

Aspect Ratio
20:9	18:9
Bezel-less display
-	Yes
Display Type
LTPO+ OLED	IPS LCD
Pixel Density
489 ppi	295 ppi
Refresh Rate
120Hz	-
Resolution
32 MP f/1.9, Primary Camera	720x1440 px (HD+)
Screen Size
6.9 inch	5.45 inches (13.84 cm)
Screen to Body Ratio (calculated)
-	72.38 %
Touch Screen
-	Yes, Capacitive Touchscreen, Multi-touch

Front Camera

Resolution
-	5 MP, Primary Camera

General

Brand
Apple	Karbonn
Custom UI
-	Android Go
Launch Date
September 1, 2026	June 15, 2021 (Official)
Model
iPhone 18 Pro Max	-
Operating System
iOS v16	Android v10

Main Camera

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

Multimedia

Audio Jack
-	3.5 mm
Loudspeaker
-	Yes

Network & Connectivity

Bluetooth
Yes, v5.3	Yes, v4.2
GPS
Yes with A-GPS, Glonass	Yes with A-GPS
NFC
-	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) 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) 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
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	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: eSIM	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
VoLTE
Yes	Yes
Wi-Fi
-	Yes, Wi-Fi 4 (802.11 a/b/g/n)
Wi-Fi Features
-	Mobile Hotspot

Performance

Architecture
-	64 bit
CPU
-	Octa core, 1.6 GHz, Cortex A55
Chipset
-	Unisoc SC9863
Graphics
Apple GPU (Five-core graphics)	PowerVR GE8322
Processor
Apple A20 Pro	-
Processor Fabrication
2 nm	-
RAM
12GB	2 GB
RAM Type
LPDDR5	-

Sensors

Fingerprint Sensor
No	No
Other Sensors
-	Light sensor, Proximity sensor, Accelerometer

Storage

Expandable Memory
No	Yes, Up to 256 GB
Internal Memory
256GB, 512GB, 1TB, 2TB	32 GB