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Karbonn KT21 Express vs Micromax A78

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Karbonn KT21 Express Remove phone

Posted: 25 Apr 2012
Market Status: Released
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Micromax A78 Remove phone

Posted: 08 Aug 2012
Market Status: Released

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Design
Device typeFeature phoneSmart phone 
OS Android (2.3) 
Dimensions 4.72 x 2.50 x 0.43 inches (120 x 63.5 x 10.9 mm) 
Display
Physical size2.8 inches3.5 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 
Colors 262 144 
TouchscreenMulti-touchMulti-touch 
FeaturesProximity sensorLight sensor, Proximity sensor 
Camera
Camera3.2 megapixels3 megapixels 
FlashYesLED 
FeaturesDigital zoomGeo tagging 
CamcorderYesYes 
Front-facing camera 0.3 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 time 4.00 hours
the average is 11 h (675 min)
 
Stand-by time 10.4 days (250 hours)
the average is 20 days (477 h)
 
Capacity1000 mAh1300 mAh 
specifications continue after the ad
Multimedia
Music player   
Filter by Album, Artist, Playlists 
Features Album art cover, Background playback 
RadioFM, Recording option  
SpeakersLoudspeakerLoudspeaker 
Internet browsing
Built-in online services supportFacebook, YouTube (upload)YouTube (upload), Picasa/Google+ 
Technology
GSM900, 1800 MHz900, 1800 MHz 
UMTS 2100 MHz 
DataEDGE, GPRSHSDPA 7.2 Mbit/s, HSUPA 5.76 Mbit/s, EDGE, GPRS 
Multiple SIM cards 2 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
BluetoothYes3.0 
Wi-Fi 802.11 b, g, n 
Mobile hotspot Yes 
USB USB 2.0 
Connector microUSB 
Features Mass storage device, USB charging 
Other Computer sync, OTA sync 
Other features
Notifications Music ringtones, Polyphonic ringtones, Vibration 
Sensors Accelerometer, Compass 
Other Voice dialing, Voice commands, Voice recording 

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

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