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Karbonn KT21 Express vs Samsung Galaxy Ace Size compare

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Karbonn KT21 Express Remove phone

Posted: 25 Apr 2012
Market Status: Released
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Samsung Galaxy Ace Remove phone

Posted: 14 Jan 2011
Market Status: Released

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Design
Device typeFeature phoneSmart phone 
OS Android (2.3, 2.2) 
Dimensions 4.43 x 2.36 x 0.45 inches (112.4 x 59.9 x 11.5 mm) 
Weight 3.99 oz (113 g)
the average is 5.3 oz (150 g)
 
FeaturesNumeric keypad  
ColorsBrown  
Display
Physical size2.8 inches3.5 inches 
Resolution 320 x 480 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.

 165 ppi 
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 
Screen-to-body ratio 54.08 % 
FeaturesProximity sensorProximity sensor, Scratch-resistant glass (Corning Gorilla Glass) 
Camera
Camera3.2 megapixels5 megapixels 
FlashYesLED 
Hardware Features Autofocus 
Software FeaturesDigital zoomSmile detection 
Settings White balance presets 
Shooting Modes Burst mode, Panorama, Effects 
CamcorderYes320x240 (QVGA) (20 fps) 
Hardware
System chip

System chip - Most modern handsets use an advanced chip that includes many of the device’s hardware modules like the processor, Wi-Fi, Bluetooth and sometimes even the wireless radio. This field shows what particular system chip (or System-on-a-Chip) is used in the phone.

 Qualcomm Snapdragon S1 
Model MSM7227 
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, 800 MHz, ARM11 
Graphics processor Adreno 200 
Built-in storage 0.158 GB 
Storage expansionmicroSD, microSDHC up to 32 GBmicroSD, microSDHC up to 32 GB 
Battery
Capacity1000 mAh1350 mAh 
User replaceableYesYes 
Talk time 11.00 hours
the average is 14 h (825 min)
 
Stand-by time 26.7 days (640 hours)
the average is 16 days (384 h)
 
Talk time (3G) 6.50 hours
the average is 16 h (960 min)
 
Stand-by time (3G) 17.5 days (420 hours)
the average is 22 days (517 h)
 
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Multimedia
Mirroring DLNA 
Music player   
Filter by Album, Artist, Playlists 
Features Album art cover, Background playback 
RadioFM, Recording optionFM, Stereo, RDS 
SpeakersLoudspeakerEarpiece, Loudspeaker 
Cellular
GSM900, 1800 MHz850, 900, 1800, 1900 MHz 
UMTS 900, 2100 MHz 
Data HSDPA 7.2 Mbit/s, UMTS 
Connectivity
BluetoothYes3.0 
Wi-Fi 802.11 b, g, n 
USB USB 2.0 
Connector microUSB 
Features Mass storage device, USB charging 
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.

 A-GPS 
Navigation Yes 
Other Computer sync, OTA sync 
Other features
Notifications Haptic feedback, Music ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone 
Sensors Accelerometer, Compass 
Other Voice recording 
Availability
Officially announced 26 Jan 2011 
Regulatory Approval
FCC approval

FCC approval - The Federal Communications Commission (FCC) is an independent United States government agency, directly responsible to Congress. The FCC was established by the Communications Act of 1934 and is charged with regulating interstate and international communications by radio, television, wire, satellite and cable. The FCC's jurisdiction covers the 50 states, the District of Columbia, and U.S. possessions. Every wireless phone device that is sold in the U.S. has to be tested and approved for sale by the FCC.

   
Date approved

Date approved - Shows the date when the particular phone is approved by the Federal Communications Commission

 08 Dec 2010 
 FCC ID value: A3LGTS5830 link 
FCC measured SAR

FCC measured SAR - Working closely with federal health and safety agencies, such as the Food and Drug Administration (FDA), the FCC has adopted limits for safe exposure to radiofrequency (RF) energy. These limits are given in terms of a unit referred to as the Specific Absorption Rate (SAR), which is a measure of the amount of radio frequency energy absorbed by the body when using a mobile phone. The FCC requires cell phone manufacturers to ensure that their phones comply with these objective limits for safe exposure. Any cell phone at or below these SAR levels (that is, any phone legally sold in the U.S.) is a "safe" phone, as measured by these standards. The FCC limit for public exposure from cellular telephones is an SAR level of 1.6 watts per kilogram (1.6 W/kg).

   
Head 0.69 W/kg 
Measured in 1900 MHz 
Body 1.31 W/kg 
Measured in 1900 MHz 
EU SAR   
Head 0.84 W/kg 

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

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