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Karbonn K451M vs Lemon Mobiles B639

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Karbonn K451M Remove phone

Posted: 04 Sep 2011
Market Status: Released
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Lemon Mobiles B639 Remove phone

Posted: 07 Feb 2012
Market Status: Released

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Design
Device typeFeature phoneFeature phone 
Dimensions4.02 x 1.77 x 0.57 inches (102 x 45 x 14.5 mm)4.33 x 1.85 x 0.54 inches (110 x 47 x 13.75 mm) 
Weight2.82 oz (80 g)
the average is 4.8 oz (137 g)
3.35 oz (95 g)
the average is 4.8 oz (137 g)
 
Display
Physical size2.0 inches2.6 inches 
Resolution176 x 220 pixels  
Pixel density

Pixel density - The pixel density of a display represents the number of pixels over an area of one inch. It’s measured in “pixels per inch”, or ppi. The higher the number, the more detailed and good-looking the display is.

141 ppi  
Screen-to-body ratio27.42 %  
Colors262 144  
Camera
Camera0.1 megapixels CIF (288x352)1.3 megapixels 
CamcorderYes  
Hardware
Storage expansionmicroSD, microSDHCmicroSD, microSDHC up to 16 GB 
Battery
Talk time4.00 hours
the average is 11 h (675 min)
20.00 hours
the average is 11 h (675 min)
 
Stand-by time12.5 days (300 hours)
the average is 20 days (477 h)
45.0 days (1080 hours)
the average is 20 days (477 h)
 
Capacity1100 mAh3000 mAh 
specifications continue after the ad
Multimedia
RadioFM, Internal antennaFM 
Internet browsing
Built-in online services support Facebook, Twitter 
Technology
GSM900, 1800 MHz900, 1800 MHz 
DataGPRSGPRS 
Multiple SIM cards2 slots2 slots 
Connectivity
BluetoothYesYes 
USB Yes 
Features Mass storage device 
Other Tethering, Computer sync 
Other features
NotificationsMusic ringtones (MP3), Polyphonic ringtones (64 voices), Vibration, SpeakerphoneMusic ringtones (MP3, WAV, AMR, MIDI), Polyphonic ringtones, Vibration, Silent mode 
SensorsAccelerometer  
Other Voice recording 

To see the full specifications with in-depth details click here.

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