Alcatel OT-813D vs NIU C21A
Alcatel OT-813D
NIU C21A
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Network
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2G networkGSM 900, 1800GSM 850, 900, 1800, 1900
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GPRSYesYes
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EDGEYes
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Availability
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Oficially announced2011-52013-3
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Status20112013-4
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Design
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SIMDual SIM (Mini-SIM, dual stand-by)Dual SIM (Mini-SIM)
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Height115 mm106 mm
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Width61.1 mm45 mm
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Thickness12.9 mm14.5 mm
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Weight101 g73 g
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KeyboardQWERTY-
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ColorsBlack, Blue, Gray, Orange, PurpleBlack, Blue, Fuchsia, Green, Purple, Red, White
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Display
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Display typeTFT resistive touchscreenTFT
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Physical size2.4 inches1.8 inches
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Resolution320 x 240 pixels128 x 160 pixels
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Pixel density167 ppi114 ppi
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Display colors262144262144
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Hardware
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CPU208 MHz
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Internal storage50 MB64 Mbit
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Memory cardmicroSDmicroSD
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Memory card max16 GB32 GB
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Main camera
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Main camera2 MP
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Primary camera resolution1600 x 1200 pixels640 x 480 pixels
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Primary camera videoQCIF@15fpsno
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Camera features-No
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Selfie camera
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Secondary cameraNoNo
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Sound
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3.5mm jackYesNo
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LoudspeakerYesYes
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NotificationsVibration; MP3 ringtonesVibration, Polyphonic
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Multimedia
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Radio FMStereo FM radio with RDSStereo FM radio
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Connectivity
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WLANWi-Fi 802.11b, 802.11g
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USBmicroUSB 2.0Yes
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Bluetoothv2.1v2.0
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Bluetooth A2DPYes-
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GPSNoNo
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Features
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Messaging SMSSMSSMS
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Messaging MMSMMS-
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Messaging EmailEmail-
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Messaging IMIMIM
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Messaging Push EmailPush Email-
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WAPWAP 2.0/xHTMLYes
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JavaYesNo
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Java MIDPMIDP 2.1-
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity1000 mAh600 mAh
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Talk time10 h4 h
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Standby time720 h200 h
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