Karbonn KT21 Express vs Oppo R1001 Joy
Karbonn KT21 Express
Oppo R1001 Joy
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Network
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2G networkGSMGSM 850, 900, 1800, 1900
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3G network-HSDPA 2100
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HSPA speed-HSPA
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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 (Mini-SIM/ Micro-SIM)
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Height124 mm
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Width63 mm
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Thickness9.9 mm
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Weight125 g
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ColorsBlackBlack, White
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Display
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Display typeTFT capacitive touchscreenTFT capacitive touchscreen
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Physical size2.8 inches4.0 inches
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Resolution-480 x 800 pixels
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Pixel density-233 ppi
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Display colors-16777216
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Hardware
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CPUQuad-core 1.3 GHz ARM Cortex-A7
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Chipset-Mediatek MT6582
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GPU-Mali-400MP2
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Memory RAM-512 MB
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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 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 flashLED flashLED flash
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Camera features-Geo-tagging
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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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WLAN DLNA-Yes
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USBYesmicroUSB 2.0
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BluetoothYesYes
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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 Push Email-Push Email
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JavaYesYes, via Java MIDP emulator
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Sensors-Accelerometer, proximity
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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 mAh1700 mAh
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Talk time-7 h
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Standby time-280 h
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OS
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OS-Android OS, v4.2.1 (Jelly Bean)
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