Karbonn KT21 Express vs Lenovo A680
Karbonn KT21 Express
Lenovo A680
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Network
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2G networkGSMGSM 900, 1800, 1900
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3G network-HSDPA 900, 2100
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HSDPA speed-HSDPA, 21 Mbps
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HSUPA speed-HSUPA, 5.76 Mbps
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2014-122014-5
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Status2014-5
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Design
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SIMDual SIM (Mini-SIM)Dual SIM
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Height145 mm
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Width73.5 mm
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Thickness10.8 mm
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Weight165 g
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ColorsBlackBlack, White
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Display
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Display typeTFT capacitive touchscreenCapacitive touchscreen
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Physical size2.8 inches5.0 inches
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Resolution-480 x 854 pixels
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Pixel density-196 ppi
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Hardware
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CPUQuad-core 1.3 GHz
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Chipset-Mediatek MT6582
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Memory RAM-1 GB
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Internal storage-4 GB
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Memory cardmicroSDmicroSD
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Memory card max32 GB32 GB
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Main camera
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Main camera3.15 MP5 MP
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Primary camera resolution2048 x 1536 pixels2592 x 1944 pixels
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Primary camera videovideovideo
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Primary camera flashLED flash-
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Selfie camera
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Secondary cameraNoVGA camera
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsVibration, Polyphonic(64), MP3 ringtonesVibration; MP3, WAV ringtones
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Multimedia
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Radio FMFM radioFM radio
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Radio recordingFM recording-
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11n
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WLAN WiFi Hotspot-Yes
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USBYesmicroUSB 2.0
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BluetoothYesv3.0
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GPSNoYes, with A-GPS
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Features
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Messaging SMSSMSSMS(threaded view)
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Messaging MMSMMSMMS
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Messaging EmailEmailEmail
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Messaging IM-IM
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Messaging Push Email-Push Mail
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JavaYesYes, via Java MIDP emulator
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Browser
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HTML-Yes
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BrowserYes-
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Battery
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Battery typeLi-IonLi-Po
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Battery capacity1000 mAh2000 mAh
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Talk time--
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Talk time 3G-24 h
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Standby time--
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Standby time 3G-350 h
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OS
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OS-Android OS, v4.2.2 (Jelly Bean)
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