Karbonn KT21 Express vs LG Optimus S
Karbonn KT21 Express
LG Optimus S
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Network
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2G networkGSMCDMA 800, 1900
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3G network-CDMA2000 1xEV-DO
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EV-DO speed-153.2 kbps
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GPRSYes
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EDGEYes
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Availability
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Oficially announced2014-122010-10
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Status2010-12
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Design
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SIMDual SIM (Mini-SIM)Mini-SIM
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Height114 mm
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Width59 mm
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Thickness13 mm
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Weight130 g
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ColorsBlackGray
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Display
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Display typeTFT capacitive touchscreenTFT capacitive touchscreen
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Physical size2.8 inches3.2 inches
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Resolution-320 x 480 pixels
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Pixel density-180 ppi
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Display colors-16777216
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Hardware
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CPU600 MHz
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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 MP3.15 MP
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Primary camera resolution2048 x 1536 pixels2048 x 1536 pixels
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Primary camera videovideo480p
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Primary camera Autofocus-autofocus
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Primary camera flashLED flash-
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Selfie camera
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Secondary cameraNoNo
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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 ringtones
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Multimedia
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Radio FMFM radio-
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Radio recordingFM recording-
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Connectivity
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WLANWi-Fi 802.11b, 802.11g
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WLAN WiFi Hotspot-Yes
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USBYesYes
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BluetoothYesv2.1
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Bluetooth A2DP-Yes
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Bluetooth EDR-Yes
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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 Email
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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-Ion
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Battery capacity1000 mAh1500 mAh
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Talk time-5 h
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Standby time-200 h
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OS
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OS-Android OS, v2.2 (Froyo)
