Karbonn A21 vs NIU GO 21
Karbonn A21
NIU GO 21
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Network
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2G networkGSM 900, 1800, 1900GSM 850, 900, 1800, 1900
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3G networkHSDPA 2100-
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HSDPA speedHSDPA, 7.2 Mbps-
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GPRSYesYes
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EDGEYes
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Availability
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Oficially announced2014-122014-5
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Status2014-6
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Design
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SIMDual SIM (Mini-SIM)Dual SIM (Mini-SIM)
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Height105 mm
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Width44.9 mm
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Thickness14.2 mm
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Weight66 g
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ColorsPearl WhiteBlack, Blue, Gray, Green, Orange, Red
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Display
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Display typeTFT capacitive touchscreenTFT
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Physical size4.5 inches1.8 inches
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Resolution480 x 800 pixels128 x 160 pixels
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Pixel density207 ppi114 ppi
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Display colors26214466560
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Hardware
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CPUDual-core 1.2 GHz
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Internal storage4 GB64 Mbit
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Memory RAM512 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, v4.0 (Ice Cream Sandwich)-
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Main camera
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Main camera5 MP
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Primary camera resolution2592 x 1944 pixels640 x 480 pixels
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Primary camera videovideono
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Primary camera Autofocusautofocus-
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Primary camera flashLED flash-
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Selfie camera
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Secondary camera-No
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Selfie camera1.3 MP
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsVibration, MP3, WAV ringtonesVibration, MP3 ringtones
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Multimedia
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RadioNo-
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Radio FM-Stereo FM radio
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11n
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USBmicroUSB 2.0microUSB 2.0
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Bluetoothv2.1v2.1
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Bluetooth A2DPYes-
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Bluetooth EDR-Yes
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GPSYes, with A-GPSNo
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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 EmailEmail-
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Messaging IMIMIM
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Messaging Push EmailPush Email-
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WAP-Yes
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JavaYes, via Java MIDP emulatorNo
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Browser
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HTMLYes-
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity1800 mAh650 mAh
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Talk time5 h6 h
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Standby time200 h200 h
