Celkon A15 vs Karbonn KT21 Express
Celkon A15
Karbonn KT21 Express
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Network
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2G networkGSM 900, 1800GSM
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2013-102014-12
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Status2013-10
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Design
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SIMDual SIM (Mini-SIM)Dual SIM (Mini-SIM)
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Height
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Width
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Thickness
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Weight
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ColorsWhiteBlack
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Display
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Display typeTFT touchscreenTFT capacitive touchscreen
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Physical size3.5 inches2.8 inches
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Resolution320 x 480 pixels-
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Pixel density165 ppi-
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Hardware
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CPUDual-core 1 GHz
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Memory ROM512 MB-
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Memory RAM256 MB-
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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, v4.2.2 (Jelly Bean)-
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Main camera
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Main camera3.15 MP3.15 MP
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Primary camera resolution2048 x 1536 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 cameraVGA cameraNo
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsVibration, Polyphonic, MP3 ringtonesVibration, Polyphonic(64), MP3 ringtones
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Multimedia
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Radio FMFM radioFM radio
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Radio recording-FM recording
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11n
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WLAN WiFi HotspotYes-
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USBmicroUSB 2.0Yes
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BluetoothYesYes
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GPSNoNo
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Features
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Messaging SMSSMS(threaded view)SMS
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Messaging MMSMMSMMS
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Messaging EmailEmailEmail
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Messaging IMIM-
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JavaNoYes
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Browser
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BrowserYesYes
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity1400 mAh1000 mAh
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Talk time--
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Standby time--