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Karbonn KT21 Express vs Micromax A78 Size compare

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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) 
FeaturesNumeric keypadFull keyboard 
ColorsBrownBrown 
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 
FeaturesProximity sensorAmbient light sensor, Proximity sensor 
Camera
Camera3.2 megapixels3 megapixels 
FlashYesLED 
Software 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 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, microSDHC up to 32 GBmicroSD, microSDHC up to 32 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.

1000 mAh1300 mAh 
TypeUser replaceable, Li - IonUser replaceable, Li - Ion 
Talk time 4.00 hours
the average is 20 h (1202 min)
 
Stand-by time 10.4 days (250 hours)
the average is 19 days (459 h)
 
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Multimedia
Music player   
Filter by Album, Artist, Playlists 
Features Album art cover, Background playback 
RadioFM, Recording option  
SpeakersLoudspeakerLoudspeaker 
Cellular
GSM900, 1800 MHz900, 1800 MHz 
UMTS 2100 MHz 
Data HSDPA 7.2 Mbit/s, HSUPA 5.76 Mbit/s 
Multiple SIM cards 2 slots 
Phone features
Sensors Accelerometer, Compass 
Notifications Music ringtones, Polyphonic ringtones, Vibration 
Other features Voice dialing, Voice commands, Voice recording 
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 
Positioning

Positioning - This field shows the positioning systems supported by the device. The most common types are GPS and A-GPS. 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.

 GPS, A-GPS 
Other Computer sync, OTA sync 

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

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