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key specs | ||||
Display | 4.00-inch | 2.80-inch | ||
Processor | 1.2GHz quad-core | one-core | ||
Front Camera | 0.3-megapixel | No | ||
Rear Camera | 2-megapixel | 3.2-megapixel | ||
RAM | 512MB | - | ||
Storage | 4GB | - | ||
Battery Capacity | 1400mAh | 1000mAh | ||
OS | Android 7.0 | Proprietary | ||
Resolution | 480x800 pixels | - | ||
general | ||||
Brand | Karbonn | Karbonn | ||
Model | Alfa 18 | KT21 | ||
Form factor | Touchscreen | Bar | ||
Dimensions (mm) | 124.50 x 64.50 x 10.60 | - | ||
Weight (g) | 112.00 | - | ||
Battery capacity (mAh) | 1400 | 1000 | ||
Removable battery | No | Yes | ||
Colours | Champagne, Grey - Gun Metal, Black - Champagne | Black | ||
Release date | - | March 1, 2012 | ||
display | ||||
Screen size (inches) | 4.00 | 2.80 | ||
Touchscreen | Yes | Yes | ||
Resolution | 480x800 pixels | - | ||
hardware | ||||
Processor | 1.2GHz quad-core | one-core | ||
RAM | 512MB | - | ||
Internal storage | 4GB | - | ||
Expandable storage | Yes | Yes | ||
Expandable storage type | microSD | microSD | ||
Expandable storage up to (GB) | 32 | 32 | ||
camera | ||||
Rear camera | 2-megapixel | 3.2-megapixel | ||
Rear flash | Yes | Yes | ||
Front camera | 0.3-megapixel | No | ||
software | ||||
Operating system | Android 7.0 | Proprietary | ||
connectivity | ||||
Wi-Fi | Yes | No | ||
Wi-Fi standards supported | 802.11 b/g/n | - | ||
GPS | Yes | No | ||
Bluetooth | Yes | Yes | ||
NFC | No | No | ||
Infrared | No | No | ||
USB OTG | Yes | No | ||
Headphones | 3.5mm | 3.5mm | ||
FM | Yes | Yes | ||
Number of SIMs | 2 | 2 | ||
Wi-Fi Direct | No | No | ||
Mobile High-Definition Link (MHL) | No | No | ||
sim 1 | ||||
SIM Type | Micro-SIM | Regular | ||
GSM/CDMA | GSM | GSM | ||
3G | Yes | No | ||
4G/ LTE | Yes | No | ||
sim 2 | ||||
SIM Type | Micro-SIM | Regular | ||
GSM/CDMA | GSM | GSM | ||
3G | Yes | No | ||
4G/ LTE | Yes | No | ||
sensors | ||||
Compass/ Magnetometer | No | No | ||
Proximity sensor | Yes | Yes | ||
Accelerometer | Yes | Yes | ||
Ambient light sensor | No | No | ||
Gyroscope | No | No | ||
Barometer | No | No | ||
Temperature sensor | No | No | ||
ratings | ||||
Overall NDTV Rating | - | Read Review | ||
Design Rating | - | |||
Display Rating | - | |||
Software Rating | - | |||
Performance Rating | - | |||
Battery Life Rating | - | |||
Camera Rating | - | |||
Value for Money Rating | - |