Celkon CT 1 vs Karbonn KT21 Express
Celkon CT 1
Karbonn KT21 Express
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Network
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2G networkGSM
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GPRSYes
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EDGEYes
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Availability
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Oficially announced2012-82014-12
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Status2012-8
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Design
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SIMNoDual SIM (Mini-SIM)
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Height196 mm
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Width114 mm
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Thickness14 mm
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Weight
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ColorsBlack, RedBlack
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Display
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Display typeTFT capacitive touchscreenTFT capacitive touchscreen
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Physical size7.0 inches2.8 inches
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Resolution480 x 800 pixels-
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Pixel density133 ppi-
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Hardware
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CPU1.2 GHz ARM Cortex-A8
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Memory cardmicroSDmicroSD
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Memory card max32 GB32 GB
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OS
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OSAndroid OS, v4.0.4 (Ice Cream Sandwich)-
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Main camera
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Main camera2 MP3.15 MP
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Primary camera resolution1600 x 1200 pixels2048 x 1536 pixels
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Primary camera videovideovideo
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Primary camera flash-LED flash
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Selfie camera
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Secondary cameraYesNo
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsN/AVibration, Polyphonic(64), MP3 ringtones
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Multimedia
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RadioNo-
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Radio FM-FM radio
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Radio recording-FM recording
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Connectivity
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WLANWi-Fi 802.11b, 802.11g
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USBYesYes
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BluetoothYes
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InfraredYes-
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GPSYesNo
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Features
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Messaging SMS-SMS
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Messaging MMS-MMS
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Messaging EmailEmailEmail
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Messaging IMIM-
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Messaging Push EmailPush Email-
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JavaYes, via Java MIDP emulatorYes
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Browser
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HTMLYes-
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Browser-Yes
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity3000 mAh1000 mAh
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Battery removableNon-removable-
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Talk time3 h-
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Standby time100 h-