x PhoneArena is hiring! Reviewer in the USA

Karbonn K451M vs Lemon Mobiles B639 Size compare

phone

Karbonn K451M Remove phone

Posted: 04 Sep 2011
Market Status: Released
phone

Lemon Mobiles B639 Remove phone

Posted: 07 Feb 2012
Market Status: Released

Add phone to compare

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 5.4 oz (155 g)
3.35 oz (95 g)
the average is 5.4 oz (155 g)
 
FeaturesNumeric keypad, D-Pad, Soft keysNumeric keypad, Soft keys, D-Pad 
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 ratio

Screen-to-body ratio - Shows what part of the frontal area of a phone its screen occupies.

27.42 %  
Camera
Camera0.1 megapixels CIF (288x352)1.3 megapixels 
CamcorderYes  
Hardware
Storage expansion

Storage expansion - Some handsets allow you to expand their storage capacity by using a memory expansion card – most often microSD. Expansion memory is mostly suitable for media storage, such as photo, video or music content.

microSD, microSDHCmicroSD, microSDHC up to 16 GB 
Battery
Capacity

Capacity - The bigger, the better! However, battery capacity is not the only factor that has an effect on battery life. Those include the chipset in use, the software running on the device, as well as the consumer's unique usage pattern.

1100 mAh3000 mAh 
TypeUser replaceableUser replaceable, Li - Polymer 
Talk time4.00 hours
the average is 20 h (1190 min)
20.00 hours
the average is 20 h (1190 min)
 
Stand-by time12.5 days (300 hours)
the average is 19 days (463 h)
45.0 days (1080 hours)
the average is 19 days (463 h)
 
specifications continue after the ad
Multimedia
RadioFM, Internal antennaFM 
Cellular
GSM900, 1800 MHz900, 1800 MHz 
Multiple SIM cards2 slots2 slots 
Phone features
SensorsAccelerometer  
NotificationsMusic ringtones (MP3), Polyphonic ringtones (64 voices), Vibration, SpeakerphoneMusic ringtones (MP3, WAV, AMR, MIDI), Polyphonic ringtones, Vibration, Silent mode 
Other features Voice recording 
Connectivity
BluetoothYesYes 
USB Yes 
Features Mass storage device 
Other Tethering, Computer sync 

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

Latest stories