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Micromax A78 vs Karbonn KT21 Express

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Micromax A78 Remove phone

Posted: 08 Aug 2012
Market Status: Released
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Karbonn KT21 Express Remove phone

Posted: 25 Apr 2012
Market Status: Released

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Design
Device typeSmart phoneFeature phone 
OSAndroid (2.3)  
Dimensions4.72 x 2.50 x 0.43 inches (120 x 63.5 x 10.9 mm)  
Display
Physical size3.5 inches2.8 inches 
Technology

Technology - There are two main screen technologies currently used in phones and tablets: LCD and AMOLED. The former usually features a light source and liquid crystals, while the latter is based on organic light-emitting diodes. Newer LCD variations like IPS-LCD and Super-LCD allow for very accurate color reproduction and very wide viewing angles, where no significant image quality loss is observed. Current AMOLED screens differ in such a way that they can exhibit much more saturated colors (sometimes too much) and incredibly high contrast levels, which is due to black color being completely black in AMOLED displays.

TFT  
Colors262 144  
TouchscreenMulti-touchMulti-touch 
FeaturesLight sensor, Proximity sensorProximity sensor 
Camera
Camera3 megapixels3.2 megapixels 
FlashLEDYes 
FeaturesGeo taggingDigital zoom 
CamcorderYesYes 
Front-facing camera0.3 megapixels VGA  
Hardware
Processor

Processor - The processor is the main computing component of a phone and is a major factor when it comes to the overall speed of the device. Some more powerful smartphones use dual-core and quad-core processors designed to deliver greater performance.

Single core, 650 MHz  
Storage expansionmicroSD, microSDHC up to 32 GBmicroSD, microSDHC up to 32 GB 
Battery
Talk time4.00 hours
the average is 12 h (709 min)
  
Stand-by time10.4 days (250 hours)
the average is 20 days (492 h)
  
Capacity1300 mAh1000 mAh 
specifications continue after the ad
Multimedia
Music player   
Filter byAlbum, Artist, Playlists  
FeaturesAlbum art cover, Background playback  
Radio FM, Recording option 
SpeakersLoudspeakerLoudspeaker 
Internet browsing
Built-in online services supportYouTube (upload), Picasa/Google+Facebook, YouTube (upload) 
Technology
GSM900, 1800 MHz900, 1800 MHz 
UMTS2100 MHz  
DataHSDPA 7.2 Mbit/s, HSUPA 5.76 Mbit/s, EDGE, GPRSEDGE, GPRS 
Multiple SIM cards2 slots  
Positioning

Positioning - This field shows the positioning systems supported by the device. There are three main types: GPS, A-GPS and GLONASS. GPS - This is one of the most widespread global positioning technologies, developed and maintained by the U.S. government. It uses satellites in order to detect your location. Works best in clear weather. A-GPS - A-GPS stands for Assisted GPS and is the industry standard for positioning and navigation. “Assisted” means that it can use local wireless networks, in addition to satellites, for quicker and more precise localization. GLONASS - GLONASS is a global positioning system, developed by the Russian Federation. It’s very similar to GPS, but isn’t so popular in cell phones.

GPS, A-GPS  
Connectivity
Bluetooth3.0Yes 
Wi-Fi802.11 b, g, n  
Mobile hotspotYes  
USBUSB 2.0  
ConnectormicroUSB  
FeaturesMass storage device, USB charging  
OtherComputer sync, OTA sync  
Other features
NotificationsMusic ringtones, Polyphonic ringtones, Vibration  
SensorsAccelerometer, Compass  
OtherVoice dialing, Voice commands, Voice recording  

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

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