Home
›
Phones
›
Comparison

Karbonn KT21 Express vs Karbonn KT 51

Rivals

Karbonn KT21 Express

Posted: 25 Apr 2012
Market Status: Released

Karbonn KT 51

Posted: 03 Feb 2012
Market Status: Released

Add phone to compare

Design
Device type	Feature phone	Feature phone
Form factor	Candybar	Candybar
Dimensions		3.74 x 2.05 x 0.58 inches (95 x 52 x 14.85 mm)
Weight		3.25 oz (92 g) the average is 4.4 oz (125 g)
Design features	Numeric keypad
Side Keys	Left: Camera shutter
Colors	Brown

Display
Physical size	2.8 inches	2.4 inches
Resolution		240 x 320 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.		167 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
Touchscreen	Capacitive, Multi-touch	Yes
Features	Proximity sensor

Battery
Talk time		4.00 hours the average is 10 h (623 min)
Stand-by time		10.0 days (240 hours) the average is 18 days (434 h)
Capacity	1000 mAh	1500 mAh
Type	Li - Ion

Hardware
Storage expansion	microSD, microSDHC up to 32 GB	microSD, microSDHC up to 8 GB

Camera
Camera	3.2 megapixels	Yes
Flash	Yes
Features	Digital zoom
Camcorder	Yes

specifications continue after the ad

Multimedia
Music player
Supported formats	MP3	MP3, WMA, WAV, AMR, MIDI
Video playback
Supported formats		MPEG4, AVI, 3GP
Radio	FM, Recording option	FM
Speakers	Loudspeaker	Earpiece, Loudspeaker

Internet browsing
Browser	supports: supports: WAP	supports: supports: WAP
Built-in online services support	Facebook, YouTube (upload)

Technology
GSM	900, 1800 MHz	900, 1800 MHz
Data	EDGE, GPRS

Phone features
Phonebook	2000 entries	500 entries
Organizer		Calendar, Alarm, To-Do, Calculator, Currency converter, World clock, Stopwatch
Messaging	SMS	SMS (200 messages), MMS, Predictive text input
E-mail	Yes
Instant Messaging	Yahoo!
JAVA JAVA - J2ME (Java 2 Platform, Micro Edition) is a technology that allows programmers to use the Java programming language and related tools to develop programs for mobile wireless information devices such as cellular phones and personal digital assistants (PDAs). J2ME consists of programming specifications and a special virtual machine, the K Virtual Machine, that allows a J2ME-encoded program to run in the mobile device.	Yes

Connectivity
Bluetooth	Yes	Yes
USB		Yes
Headphones connector	3.5mm

Other features
Notifications		Music ringtones (MP3, AMR, MIDI), Polyphonic ringtones (64 voices), Vibration, Silent mode, Speakerphone
Other		Voice recording

Regulatory Approval
EU SAR
Head		1.36 W/kg

LG Optimus F3
- Posted: 21 May 2013
- OS: Android 4.1.2
- Hardware: Dual core
- Display: 4.0 inches, 480 x 800 pixels, Capacitive Touchscreen
Kyocera Hydro EDGE
- Posted: 21 May 2013
- OS: Android 4.1
- Hardware: Dual core, 1000 MHz, 1024 MB RAM
- Display: 4.0 inches, 480 x 800 pixels, Capacitive Touchscreen
- Camera 5 megapixels
- Technology: CDMA (800 1900)
Kyocera Hydro XTRM
- Announced: yesterday
- OS: Android 4.1
- Hardware: Dual core, 1200 MHz, Krait
- Display: 4.0 inches, 480 x 800 pixels, Capacitive Touchscreen
- Camera 5 megapixels
- Technology: CDMA (800 1900)
- Data: LTE EV-DO Rev.A
Nokia Lumia 925
- Announced: 14 May 2013
- OS: Windows Phone 8
- Hardware: Dual core, 1500 MHz, Krait, 1024 MB RAM
- Display: 4.5 inches, 768 x 1280 pixels, Capacitive Touchscreen
- Camera 8.7 megapixels, 1920x1080 (1080p HD) video
- Battery: 18.3 hours of Talk Time, 432 hours of Stand-by
- Technology: GSM (850 900 1800 1900)
- Data: LTE Cat3 Downlink 100 Mbit/s LTE Cat3/4 Uplink 50 Mbit/s HSDPA+ (4G) 42.2 Mbit/s HSUPA 5.76 Mbit/s
BlackBerry Q5
- Announced: 15 May 2013
- OS: BlackBerry
- Hardware: Dual core, 1200 MHz, 2048 MB RAM
- Display: 3.1 inches, 720 x 720 pixels, Capacitive Touchscreen
- Camera 5 megapixels
Sony Xperia ZR
- Announced: 13 May 2013
- OS: Android 4.1
- Hardware: Quad core, 1500 MHz, 2048 MB RAM
- Display: 4.5 inches, 720 x 1280 pixels, Capacitive Touchscreen
- Camera 13 megapixels, 1920x1080 (1080p HD) video
- Technology: GSM (850 900 1800 1900)
- Data: HSPA (unspecified) UMTS EDGE GPRS
Nokia Lumia 928
- Announced: 10 May 2013
- OS: Windows Phone 8
- Hardware: Dual core, 1500 MHz, Krait, 1024 MB RAM
- Display: 4.5 inches, 768 x 1280 pixels, Capacitive Touchscreen
- Camera 8.7 megapixels, 1920x1080 (1080p HD) video
- Battery: 16.2 hours of Talk Time, 606 hours of Stand-by
- Technology: GSM (850 900 1800 1900), CDMA (800 1900)
- Data: LTE Cat3 Downlink 100 Mbit/s LTE Cat3/4 Uplink 50 Mbit/s HSDPA+ (4G) 42.2 Mbit/s HSUPA 5.76 Mbit/s UMTS EDGE GPRS EV-DO Rev.A
Vertu Ti
- Posted: 09 May 2013
- OS: Android 4.0
- Hardware: Dual core, 1700 MHz, 1024 MB RAM
- Display: 3.7 inches, 480 x 800 pixels, Capacitive Touchscreen
- Camera 8 megapixels, 1920x1080 (1080p HD) video
- Battery: 7.3 hours of Talk Time, 200 hours of Stand-by
- Technology: GSM (850 900 1800 1900)
- Data: HSDPA+ (4G) 42.2 Mbit/s HSUPA 5.76 Mbit/s EDGE GPRS