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ratings | ||||
Overall NDTV Rating | Read Review | - | ||
Design Rating | - | |||
Display Rating | - | |||
Software Rating | - | |||
Performance Rating | - | |||
Battery Life Rating | - | |||
Camera Rating | - | |||
Value for Money Rating | - | |||
key specs | ||||
Display | 4.00-inch | 2.20-inch | ||
Processor | Spreadtrum SC9832A | one-core | ||
Front Camera | 0.3-megapixel | No | ||
Rear Camera | 2-megapixel | 1.3-megapixel | ||
RAM | 1GB | - | ||
Storage | 8GB | - | ||
Battery Capacity | 1400mAh | 1000mAh | ||
OS | Android 7.0 | Proprietary | ||
Resolution | 480x800 pixels | 176x220 pixels | ||
general | ||||
Brand | Karbonn | Karbonn | ||
Model | A40 Indian | K21 | ||
Release date | July 1, 2017 | December 1, 2011 | ||
Form factor | Touchscreen | Bar | ||
Dimensions (mm) | 122.95 x 64.30 x 10.50 | 111.50 x 47.30 x 14.30 | ||
Weight (g) | 118.00 | 80.00 | ||
Battery capacity (mAh) | 1400 | 1000 | ||
Removable battery | Yes | Yes | ||
Colours | Blue, Coffee Brown, Black, Champagne | Coffee, Grey | ||
SAR value | 1.39 | - | ||
Alternate names | - | K21 Radio jockey | ||
display | ||||
Screen size (inches) | 4.00 | 2.20 | ||
Touchscreen | Yes | No | ||
Resolution | 480x800 pixels | 176x220 pixels | ||
hardware | ||||
Processor | 1.3GHz quad-core | one-core | ||
Processor make | Spreadtrum SC9832A | - | ||
RAM | 1GB | - | ||
Internal storage | 8GB | - | ||
Expandable storage | Yes | Yes | ||
Expandable storage type | microSD | microSD | ||
Expandable storage up to (GB) | 32 | 8 | ||
camera | ||||
Rear camera | 2-megapixel | 1.3-megapixel | ||
Rear flash | Yes | No | ||
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 | No | No | ||
Bluetooth | Yes, v 4.00 | Yes | ||
NFC | No | No | ||
Infrared | No | No | ||
USB OTG | No | No | ||
Headphones | 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 | Regular | Regular | ||
GSM/CDMA | GSM | GSM | ||
3G | Yes | No | ||
4G/ LTE | Yes | No | ||
sim 2 | ||||
SIM Type | Regular | Regular | ||
GSM/CDMA | GSM | GSM | ||
3G | Yes | No | ||
4G/ LTE | Yes | No | ||
sensors | ||||
Compass/ Magnetometer | No | No | ||
Proximity sensor | Yes | No | ||
Accelerometer | Yes | No | ||
Ambient light sensor | No | No | ||
Gyroscope | No | No | ||
Barometer | No | No | ||
Temperature sensor | No | No |